chore(deps): update grafana/helm-charts digest to 8522a28 (#871)

Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>
Co-authored-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

.github/workflows/release-helm-chart.yaml

@@ -41,7 +41,7 @@ jobs:
 
   release-chart:
     needs: validate-chart
-    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@7410eaad4501e0ab6f5efc7a7bae0d64fbbc5817
+    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@8522a28e16bc2c84c9339c22c6bdf5446b5e431a
     permissions:
       contents: write
       id-token: write