chore(deps): bump idna from 3.10 to 3.15 in /.tools/readmes

Bumps [idna](https://github.com/kjd/idna) from 3.10 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.10...v3.15)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.15'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.tools/readmes/requirements_freeze.txt

@@ -4,7 +4,7 @@ certifi==2025.1.31
 charset-normalizer==3.4.1
 click==8.1.8
 flake8==6.1.0
-idna==3.10
+idna==3.15
 iniconfig==2.0.0
 Jinja2==3.1.6
 markdown-it-py==3.0.0