Update cachetools requirement from ~=5.3.2 to ~=5.3.3

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@v5.3.2...v5.3.3)

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

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

requirements-opts.txt

@@ -20,7 +20,7 @@ tornado~=6.4 # webhooks!ext
 
 # Cachetools and APS don't have a strict stability policy.
 # Let's be cautious for now.
-cachetools~=5.3.2 # callback-data!ext
+cachetools~=5.3.3 # callback-data!ext
 APScheduler~=3.10.4 # job-queue!ext
 
 # pytz is required by APS and just needs the lower bound due to #2120