Bump propcache from 0.2.1 to 0.3.0 in /python

Bumps [propcache](https://github.com/aio-libs/propcache) from 0.2.1 to 0.3.0.
- [Release notes](https://github.com/aio-libs/propcache/releases)
- [Changelog](https://github.com/aio-libs/propcache/blob/master/CHANGES.rst)
- [Commits](aio-libs/propcache@v0.2.1...v0.3.0)

---
updated-dependencies:
- dependency-name: propcache
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

python/requirements.txt

@@ -21,7 +21,7 @@ kopf==1.37.4
 kube-custom-resource @ git+https://github.com/stackhpc/kube-custom-resource.git@851b1bf25fecdbc180e73494eb77c7899274ee15
 MarkupSafe==3.0.2
 multidict==6.1.0
-propcache==0.2.1
+propcache==0.3.0
 pydantic==1.10.21
 pydantic_core==2.27.2
 python-json-logger==3.2.1