Merge pull request #471 from pytroll/dependabot/github_actions/actions/setup-python-4

Bump actions/setup-python from 1 to 4

Author: pnuu

.github/workflows/deploy.yaml

@@ -57,7 +57,7 @@ jobs:
           git fetch --prune --unshallow
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
           python-version: '${{ matrix.python-version }}'