Set shell: bash by default on all workflows

.github/workflows/test-codeql-bundle-all.yml

@@ -16,6 +16,9 @@ on:
   schedule:
     - cron: '0 5 * * *'
   workflow_dispatch: {}
+defaults:
+  run:
+    shell: bash
 jobs:
   test-codeql-bundle-all:
     strategy:
@@ -46,7 +49,6 @@ jobs:
         languages: cpp,csharp,go,java,javascript,python,ruby 
         tools: ${{ steps.prepare-test.outputs.tools-url }}
     - name: Build code
-      shell: bash
       run: ./build.sh
     - uses: ./../action/analyze
     env: