use of fetch all for commits

Author: Npella

.github/workflows/Pharo12CI.yml

@@ -22,6 +22,8 @@ jobs:
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
+        with: 
+          fetch-depth: 0
       - uses: hpi-swa/setup-smalltalkCI@v1
         with:
           smalltalk-image: ${{ matrix.smalltalk }}