Chore: Update ghcr.io/renovatebot/renovate Docker tag to v39.14.1

Author: grafanarenovatebot[bot]

Diff for: .github/workflows/renovate-validate.yaml

@@ -13,5 +13,5 @@ jobs:
       - name: Renovate config validator
         run: |
           # Renovate updates the line below. Please keep its formatting as it is.
-          export RENOVATE_IMAGE=ghcr.io/renovatebot/renovate:39.11.7@sha256:fb15bd3a3b295384a9785938c9785538f7f365dcec4690886a43e4648d3f31ed
+          export RENOVATE_IMAGE=ghcr.io/renovatebot/renovate:39.14.1@sha256:65e8c6c295d33569995412053890b983cd01a6c8de643adb4d175889a27a07ed
           docker run -i --rm -v "$(realpath .):/repo" -w /repo --entrypoint renovate-config-validator "$RENOVATE_IMAGE" --strict

Diff for: .github/workflows/renovate.yaml

@@ -37,7 +37,7 @@ jobs:
       - name: Self-hosted Renovate
         uses: renovatebot/github-action@7743ec9e19ceeb61a3862c5d4131e6710195af11 # v40.3.3
         with:
-          renovate-version: 39.11.7@sha256:fb15bd3a3b295384a9785938c9785538f7f365dcec4690886a43e4648d3f31ed
+          renovate-version: 39.14.1@sha256:65e8c6c295d33569995412053890b983cd01a6c8de643adb4d175889a27a07ed
           configurationFile: .github/renovate-app.json
           token: "${{ steps.app-token.outputs.token }}"
         env: