feat: add renovate to docs

.github/workflows/renovate-schedule.yaml

@@ -0,0 +1,38 @@
+
+---
+
+name: Schedule - Renovate Helm Releases
+
+on: # yamllint disable-line rule:truthy
+  workflow_dispatch:
+  schedule:
+  - cron: '0 */12 * * *'
+
+jobs:
+  renovate-helm-releases:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        fetch-depth: 1
+
+    - name: Renovate Helm Releases
+      uses: k8s-at-home/renovate-helm-releases@v1
+      with:
+        cluster-path: "./cluster"
+
+    - name: Create pull request for renovatebot helm-release annotations
+      uses: peter-evans/create-pull-request@v3
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        branch: renovate-annotations
+        delete-branch: true
+        title: "chore(deps): update renovate annotations"
+        signoff: false
+        committer: GitHub <noreply@github.com>
+        author: ${{ github.actor }} <${{ github.actor }}@users.noreply.github.com>
+        commit-message: "chore(deps): update renovate annotations"
+        body: |
+          Update HelmReleases inorder for Renovate to pick up new versions of Helm charts
+        labels: renovate/annotations