ci: protect environment runs (#1207)

Signed-off-by: Hampus Kraft <[email protected]>

.github/workflows/_build-image.yaml

@@ -49,6 +49,7 @@ jobs:
   meta:
     name: resolve metadata
     runs-on: ubuntu-24.04
+    environment: builds
     timeout-minutes: 5
     outputs:
       build_version: ${{ steps.vars.outputs.build_version }}
@@ -73,6 +74,7 @@ jobs:
     name: build ${{ matrix.platform }}
     needs: meta
     runs-on: ${{ matrix.runner }}
+    environment: builds
     timeout-minutes: 75
     strategy:
       fail-fast: false
@@ -113,6 +115,7 @@ jobs:
     name: merge multi-arch manifest
     needs: [meta, build]
     runs-on: ubuntu-24.04
+    environment: builds
     timeout-minutes: 10
     steps:
       - uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f