Bump actions/setup-python from 2 to 3

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 2 to 3.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v2...v3)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/helm.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           ref: 'master'
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
       - name: Run Helm update
         run: |
           git config --global user.email "actions@github.com"