chore: bump stefanprodan/helm-gh-pages from 1.5.0 to 1.6.0

Bumps [stefanprodan/helm-gh-pages](https://github.com/stefanprodan/helm-gh-pages) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/stefanprodan/helm-gh-pages/releases)
- [Commits](stefanprodan/helm-gh-pages@b43a871...a5c9252)

---
updated-dependencies:
- dependency-name: stefanprodan/helm-gh-pages
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/chart.yaml

@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
       - name: Publish Helm chart
         # pinning to the sha f1701eb82e4d4b82016e7965501c8b6d79feaec9 from https://github.com/stefanprodan/helm-gh-pages/releases/tag/v1.4.1
-        uses: stefanprodan/helm-gh-pages@b43a8719cc63fdb3aa943cc57359ab19118eab3f
+        uses: stefanprodan/helm-gh-pages@a5c92527816f345553e78c3136b031c91724ecf1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           charts_dir: charts