[ci] Fix wrong hash used in release.yml

[cyanglaz]

The hash for wait-on-action use in 83f8c4c is wrong. This PR fixes the hash.
See the correct hash in lewagon/wait-on-check-action@a0f99ce

Fixes flutter/flutter#85127

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter. (Note that unlike the flutter/flutter repo, the flutter/plugins repo does use dart format.)
• I signed the CLA.
• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I listed at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy.
• I updated CHANGELOG.md to add a description of the change.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test exempt.
• [x]All existing and new tests are passing.

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[stuartmorgan-g]

LGTM

[cyanglaz]

Landing on red to fix the tree.