[BugFix] Fix to in MultiDiscreteTensorSpec

[Quinticx]

Description

Fixes typo from #2203

Motivation and Context

close #2203

• I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds core functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)
• Example (update in the folder of examples)

Checklist

Go over all the following points, and put an x in all the boxes that apply.
If you are unsure about any of these, don't hesitate to ask. We are here to help!

• I have read the CONTRIBUTION guide (required)
• My change requires a change to the documentation.
• I have updated the tests accordingly (required for a bug fix or a new feature).
• I have updated the documentation accordingly.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/rl/2204

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❌ 11 New Failures, 16 Unrelated Failures

As of commit 252d64a with merge base 013d110 ():

NEW FAILURES - The following jobs have failed:

• Continuous Benchmark (PR) / CPU Pytest benchmark (gh)
  Workflow failed! Resource not accessible by integration
• Continuous Benchmark (PR) / GPU Pytest benchmark (gh)
  Workflow failed! Resource not accessible by integration
• Generate documentation / build-docs (3.9, 12.1) / linux-job (gh)
  No files were found with the provided path: /home/ec2-user/actions-runner/_work/_temp/artifacts/. No artifacts will be uploaded.
• Lint / c-source / linux-job (gh)
• Unit-tests on Windows / unittests-cpu / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128
• Wheels / test-wheel (linux, ubuntu-20.04, 3.10) (gh)
  ModuleNotFoundError: No module named 'dm_env'
• Wheels / test-wheel (linux, ubuntu-20.04, 3.11) (gh)
  ModuleNotFoundError: No module named 'dm_env'
• Wheels / test-wheel (linux, ubuntu-20.04, 3.8) (gh)
  ModuleNotFoundError: No module named 'dm_env'
• Wheels / test-wheel (linux, ubuntu-20.04, 3.9) (gh)
  ##[error]The operation was canceled.
• Wheels / test-wheel-windows (3.8) (gh)
  ModuleNotFoundError: No module named 'dm_env'
• Wheels / test-wheel-windows (3.9) (gh)
  ModuleNotFoundError: No module named 'dm_env'

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• Examples Tests on Linux / tests (3.9, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Habitat Tests on Linux / tests (3.9, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Libs Tests on Linux / unittests-gym (3.9, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Libs Tests on Linux / unittests-sklearn (3.9, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Lint / python-source-and-configs / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• RLHF Tests on Linux / unittests (3.9, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.10) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.11) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-cpu (3.9) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-gpu (3.10, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-olddeps (3.8, 11.6) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-optdeps (3.10, 12.1) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Unit-tests on Linux / tests-stable-gpu (3.10, 11.8) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Wheels / test-wheel-windows (3.10) (gh) (matched win rule in flaky-rules.json)
  ##[error]The operation was canceled.
• Wheels / test-wheel-windows (3.11) (gh) (matched win rule in flaky-rules.json)
  ##[error]The operation was canceled.

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[vmoens]

LGTM thanks

[vmoens]

LGTM thanks