Fix spelling mistake in commit workflow

Author: NorbertLoh

.github/workflows/commit-workflow.yml

@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   linux-setup-and-tests:
     runs-on: ubuntu-latest
-    default:
+    defaults:
       run:
         working-directory: ./frontend/peerprep
     strategy:
@@ -23,7 +23,7 @@ jobs:
 
   macos-setup-and-tests:
     runs-on: macos-latest
-    default:
+    defaults:
       run:
         working-directory: ./frontend/peerprep
     strategy:
@@ -41,7 +41,7 @@ jobs:
 
   windows-setup-and-tests:
     runs-on: windows-latest
-    default:
+    defaults:
       run:
         working-directory: ./frontend/peerprep
     strategy: