chore: Update renovatebot/github-action action to v46.1.8

Author: grafanarenovatebot[bot]

actions/renovate/action.yaml

@@ -57,7 +57,7 @@ runs:
         owner: ${{ github.repository_owner }}
 
     - name: Self-hosted Renovate
-      uses: renovatebot/github-action@7b4b65bf31e07d4e3e51708d07700fb41bc03166 # v46.1.3
+      uses: renovatebot/github-action@b67590ea780158ccd13192c22a3655a5231f869d # v46.1.8
       with:
         renovate-version: ${{ inputs.renovate-version }}
         token: ${{ steps.app-token.outputs.token }}