chore(ddtrace/tracer): fix typo

[felixge]

What does this PR do?

Fix a comment typo introduced in #3566.

Motivation

OCD 😂

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• New code is free of linting errors. You can check this by running ./scripts/lint.sh locally.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild.

Unsure? Have a question? Request a review!

[rarguelloF]

Thanks 😄

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-07-31 11:44:38

Comparing candidate commit 4c1419c in PR branch push-xovnlyvrslrw with baseline commit 15458fd in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 24 metrics, 0 unstable metrics.

[rarguelloF]

/merge

[dd-devflow-routing-codex]

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2025-07-31 11:34:40 UTC ℹ️ Start processing command /merge

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2025-07-31 11:34:52 UTC ℹ️ MergeQueue: waiting for PR to be ready

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2025-07-31 11:47:14 UTC ℹ️ MergeQueue: merge request added to the queue

The expected merge time in main is approximately 14m (p90).

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2025-07-31 11:57:40 UTC ℹ️ MergeQueue: This merge request was merged