DEP(deps): Update cachetools requirement from ~=5.5.2 to ~=6.2.1

Updates the requirements on [cachetools](https://github.com/tkem/cachetools) to permit the latest version.
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](tkem/cachetools@v5.5.2...v6.2.1)

---
updated-dependencies:
- dependency-name: cachetools
  dependency-version: 6.2.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -6,7 +6,7 @@ requests~=2.32.5
 
 boto3~=1.40.66
 
-cachetools~=5.5.2
+cachetools~=6.2.1
 setuptools~=80.9.0
 pytz~=2025.1
 confuse~=2.1.0

requirements.txt

@@ -3,7 +3,7 @@ requests~=2.32.5
 
 boto3~=1.40.66
 
-cachetools~=5.5.2
+cachetools~=6.2.1
 setuptools~=80.9.0
 pytz~=2025.1
 confuse~=2.1.0