Bump propcache from 0.2.0 to 0.2.1 in /sync (#869)

Bumps [propcache](https://github.com/aio-libs/propcache) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/aio-libs/propcache/releases)
- [Changelog](https://github.com/aio-libs/propcache/blob/master/CHANGES.rst)
- [Commits](aio-libs/propcache@v0.2.0...v0.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

sync/requirements.txt

@@ -18,7 +18,7 @@ httpx==0.28.0
 idna==3.10
 kube-custom-resource==0.6.1
 multidict==6.1.0
-propcache==0.2.0
+propcache==0.2.1
 pydantic==2.10.2
 pydantic_core==2.27.1
 pyhelm3==0.4.0