Merge pull request #429 from BitGo/pin-macos-runner

ci: pin the macos runner version

Author: Louis Varin

.github/workflows/release.yml

@@ -56,7 +56,7 @@ jobs:
 
   mac-build:
     name: Create Mac release
-    runs-on: macos-latest
+    runs-on: macos-12
     needs:
       - get-current-state
     env: