Update integration-tests.yml (#437)

* Use macos-12 where colima still works

.github/workflows/integration-tests.yml

@@ -5,17 +5,25 @@ on: [push, pull_request]
 
 permissions: read-all
 
+concurrency:
+  # On master/release, we don't want any jobs cancelled
+  # On PR branches, we cancel the job if new commits are pushed
+  # More info: https://stackoverflow.com/a/70972844/1261287
+  group: ${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
 jobs:
   build:
     name: PR unit tests
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-12]
+      fail-fast: false
     runs-on: ${{ matrix.os }}
 
     steps:
     - name: start docker
-      if: ${{ matrix.os == 'macos-latest' }}
+      if: ${{ matrix.os == 'macos-12' }}
       run: |
         brew install docker
         colima start