chore: add notification action

[skip ci]

.github/actions/notify/action.yaml

@@ -38,7 +38,7 @@ runs:
   steps:
     - name: Install prerequisites
       shell: bash
-      run: apk add --no-cache curl jq
+      run: apt update && apt install -y curl jq
 
     - name: Send PR notification to Google Chat
       shell: bash

.github/workflows/notify_pr.yaml

@@ -7,9 +7,7 @@ on:
 
 jobs:
   notify-pr-google-chat:
-    runs-on: docker
-    container:
-      image: alpine:latest
+    runs-on: stackit-docker
     steps:
       - name: Notify
         uses: ./.github/actions/notify