ci: pin GitHub Actions to commit SHAs (4 pin(s)) (#35)

Co-authored-by: mirkosalvato1-ctrl <227404546+mirkosalvato1-ctrl@users.noreply.github.com>

Author: mirkosalvato1-ctrl

.github/workflows/docs.yml

@@ -38,10 +38,10 @@ jobs:
         make html
 
     - name: Setup Pages
-      uses: actions/configure-pages@v4
+      uses: actions/configure-pages@1f0c5cde4bc74cd7e1254d0cb4de8d49e9068c7d  # v4
 
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@v3
+      uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa  # v3
       with:
         path: './docs/build/html'
 
@@ -55,4 +55,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e  # v4

.github/workflows/publish.yml

@@ -36,7 +36,7 @@ jobs:
         uv run pytest -v --cov=openchatbi --cov-report=xml
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@ab904c41d6ece82784817410c45d8b8c02684457  # v3
       with:
         file: ./coverage.xml
         flags: unittests