deploy: install twine for check

Author: orbeckst

.github/workflows/deploy.yaml

@@ -68,10 +68,15 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Install build dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install pipx twine
+          
       - name: Build sdist
         run: pipx run build --sdist
 
-      - name: Check package
+      - name: Check source package
         run: |
           twine check dist/*.tar.gz