Add `fail-fast: false` in github/workflows/actions.yml

Without this a failure of the `ubuntu-latest bazel` job cancels the `ubuntu-latest cmake` job or vice versa, which is totally not useful.

PiperOrigin-RevId: 656737649

.github/workflows/actions.yml

@@ -18,6 +18,7 @@ jobs:
 
 
   unix:
   unix:
     strategy:
     strategy:
+      fail-fast: false
       matrix:
       matrix:
         runs-on: [ubuntu-latest]
         runs-on: [ubuntu-latest]
         build_tool: [bazel, cmake]
         build_tool: [bazel, cmake]