Bump cachetools from 5.5.2 to 6.1.0 in /requirements

Bumps [cachetools](https://github.com/tkem/cachetools) from 5.5.2 to 6.1.0.
- [Changelog](https://github.com/tkem/cachetools/blob/master/CHANGELOG.rst)
- [Commits](tkem/cachetools@v5.5.2...v6.1.0)

---
updated-dependencies:
- dependency-name: cachetools
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/prod.txt

@@ -787,9 +787,9 @@ 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==6.1.0 \
+    --hash=sha256:1c7bb3cf9193deaf3508b7c5f2a79986c13ea38965c5adcff1f84519cf39163e \
+    --hash=sha256:b4c4f404392848db3ce7aac34950d17be4d864da4b8b66911008e430bc544587
 # sqlparse is required by django2.2+
 sqlparse==0.5.3 \
     --hash=sha256:09f67787f56a0b16ecdbde1bfc7f5d9c3371ca683cfeaa8e6ff60b4807ec9272 \