Fix changelog copy errors in change-notes and CHANGELOG.md files

[mario-campos]

This PR is a duplicate of #21947 with the main difference being that this PR targets main.

This PR is necessary because, otherwise, the changelog-generation tool, spark, will generate a changelog with the typos on every run, requiring manual edits to the generated PR.

[Copilot]

Pull request overview

This PR fixes copy/wording errors in released change-note source files and their generated CHANGELOG.md counterparts so that the spark changelog-generation tool no longer reproduces those typos on each run.

Changes:

• Corrected wording in Python 7.1.2 change notes / changelog (“less fewer positive results” → “fewer false positive results”).
• Corrected wording in Actions 0.6.29 change notes / changelog (“on in minor point” → “on a minor point”).
• Corrected wording/capitalization in Actions 0.4.37 change notes / changelog (“include” → “including”, “sha1 or sha256” → “SHA-1 or SHA-256”).

Show a summary per file

File	Description
python/ql/lib/CHANGELOG.md	Fixes a copy error in the generated Python changelog entry for 7.1.2.
python/ql/lib/change-notes/released/7.1.2.md	Fixes the underlying released change note text so spark won’t regenerate the typo.
actions/ql/src/CHANGELOG.md	Fixes a copy error in the generated Actions (src) changelog entry for 0.6.29.
actions/ql/src/change-notes/released/0.6.29.md	Fixes the underlying released change note text so spark won’t regenerate the typo.
actions/ql/lib/CHANGELOG.md	Fixes copy/capitalization errors in the generated Actions (lib) changelog entry for 0.4.37.
actions/ql/lib/change-notes/released/0.4.37.md	Fixes the underlying released change note text so spark won’t regenerate the typo.

Copilot's findings

• Files reviewed: 6/6 changed files
• Comments generated: 0