fix(ci): use 'build' label

.github/workflows/ci.yaml

@@ -40,24 +40,17 @@ jobs:
   build-on-pr:
     if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
-    timeout-minutes: 120
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
-
-      - name: Check if "build" label is present
-        id: label-check
-        uses: actions-ecosystem/action-get-labeled@v1
-        with:
-          label: 'build'
+        uses: actions/checkout@v4
 
       - name: Log in to GitHub Container Registry
-        if: steps.label-check.outputs.labeled == 'true'
+        if: ${{ github.event.label.name == 'build' }}
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
       - name: Build and push to ghcr
-        if: steps.label-check.outputs.labeled == 'true'
+        if: ${{ github.event.label.name == 'build' }}
         run: |
           TAG="pr-${{ github.event.pull_request.number }}-$(git rev-parse --short HEAD)"
           docker build -t ghcr.io/camptocamp/pg253:${TAG} \
@@ -66,6 +59,6 @@ jobs:
           docker push ghcr.io/camptocamp/pg253:${TAG}
 
       - name: Build only
-        if: steps.label-check.outputs.labeled != 'true'
+        if: ${{ github.event.label.name != 'build' }}
         run: |
           docker build --pull --no-cache .