use macos-latest instead of ubuntu in frontend canister building GHA

Author: Marcin Nowak-Liebiediew

.github/workflows/build-frontend-canister.yml

@@ -14,7 +14,7 @@ env:
 
 jobs:
   frontend:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
     name: frontend-canister-up-to-date:required
     steps:
       - name: Check out the repo