Bump cachetools from 5.5.2 to 6.0.0 in /requirements

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](tkem/cachetools@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] <[email protected]>

Author: dependabot[bot]

requirements/prod.txt

@@ -785,9 +785,9 @@ basket-client==1.1.0 \
 webencodings==0.5.1 \
     --hash=sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78 \
     --hash=sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923
-cachetools==5.5.2 \
-    --hash=sha256:1a661caa9175d26759571b2e19580f9d6393969e5dfca11fdb1f947a23e640d4 \
-    --hash=sha256:d26a22bcc62eb95c3beabd9f1ee5e820d3d2704fe2967cbe350e20c8ffcd3f0a
+cachetools==6.0.0 \
+    --hash=sha256:82e73ba88f7b30228b5507dce1a1f878498fc669d972aef2dde4f3a3c24f103e \
+    --hash=sha256:f225782b84438f828328fc2ad74346522f27e5b1440f4e9fd18b20ebfd1aa2cf
 # sqlparse is required by django2.2+
 sqlparse==0.5.3 \
     --hash=sha256:09f67787f56a0b16ecdbde1bfc7f5d9c3371ca683cfeaa8e6ff60b4807ec9272 \