fix pharo version

Author: jecisc

.github/workflows/scriptabledebugger.yml

@@ -23,11 +23,11 @@ jobs:
     strategy:
         matrix:
           os: [ ubuntu-latest ]
-          smalltalk: [ Pharo64-13 ]
+          smalltalk: [ Pharo64-alpha ]
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.smalltalk }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2 # or 3
+      - uses: actions/checkout@v3
       - name: Setup smalltalkCI
         uses: hpi-swa/setup-smalltalkCI@v1
         with: