Fix yaml duplicated mapping key

[Abacn]

• Fix TypeScript tests broken

Please add a meaningful description for your change here

Introduced in #22561

---

Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:

• Choose reviewer(s) and mention them in a comment (R: @username).
• Mention the appropriate issue in your description (for example: addresses #123), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, comment fixes #<ISSUE NUMBER> instead.
• Update CHANGES.md with noteworthy changes.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

See the Contributor Guide for more tips on how to make review process smoother.

To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

[Abacn]

TypeScript tests fixed.

R: @damccorm
CC: R: @TheNeuralBit

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[codecov]

Codecov Report

Merging #22952 (a7569eb) into master (a60105a) will increase coverage by 0.00%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #22952 +/- ##
=======================================
Coverage 73.68% 73.68% =======================================
Files 713 713 Lines 94988 94988 =======================================
+ Hits 69992 69996 +4 + Misses 23695 23691 -4 
Partials 1301 1301 

Flag	Coverage Δ
python	83.51% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../python/apache_beam/transforms/periodicsequence.py	98.38% <0.00%> (-1.62%)	⬇️
sdks/python/apache_beam/runners/direct/executor.py	96.46% <0.00%> (-0.55%)	⬇️
...hon/apache_beam/runners/worker/bundle_processor.py	93.67% <0.00%> (+0.24%)	⬆️
sdks/python/apache_beam/transforms/combiners.py	93.43% <0.00%> (+0.38%)	⬆️
sdks/python/apache_beam/io/source_test_utils.py	89.40% <0.00%> (+1.38%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[damccorm]

Run Typescript PreCommit

[damccorm]

Run Go PreCommit

[Abacn]

Thanks @damccorm for taking look at this. Tests now passed.

[damccorm]

LGTM