chore(deps): bump cachetools from 5.5.2 to 6.0.0

Bumps [cachetools](https://github.com/tkem/cachetools) from 5.5.2 to 6.0.0.
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/tkem/cachetools/compare/v5.5.2...v6.0.0)

---
updated-dependencies:
- dependency-name: cachetools
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -12,7 +12,7 @@ python-telegram-bot==22.1
 # can't be hard-pinned due to telegram-bot pinning httpx with ~
 httpx>=0.24.1
 humanize==4.12.3
-cachetools==5.5.2
+cachetools==6.0.0
 requests==2.32.3
 urllib3==2.4.0
 certifi==2025.4.26