docs: fix create issue screen: rename config.yaml -> yml

[tlhunter]

• the create issue screen has issue templates but no external links
• the only difference I can see is that I used config.yaml whereas in other repos it's config.yml
  • very confusing since the issue templates use .yaml...
• follow up to docs: mandatory issue templates (AIDM-423) #11765

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
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• Reviewer has checked that all the criteria below are met
• Title is accurate
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• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
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• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

.github/ISSUE_TEMPLATE/config.yml                                       @DataDog/python-guild @DataDog/apm-core-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-12-20 00:28:42

Comparing candidate commit 9fd14e7 in PR branch tlhunter/fix-create-issue-screen with baseline commit 350307c in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 394 metrics, 2 unstable metrics.