should match exactly

Author: maxbelanger

.github/workflows/pypiupload.yml

@@ -15,7 +15,7 @@ jobs:
         python-version: [2.7, 3.x]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
     - if: ${{ matrix.python-version == '2.7' }}
       name: Setup Python environment (2.7)
       run: |