Update actions to 3.5.2

Author: Victor Barberan

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v3.5.2
 
     - name: Setup Python
       uses: actions/setup-python@v1