Bump actions/setup-python from 3 to 4

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 3 to 4.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/py-dead-code.yml

@@ -15,7 +15,7 @@ jobs:
           echo "package=$(ls -F | grep \/$ | grep -v "bin\|examples\|tests" | sed -n "s/\///g;1p")" >> $GITHUB_ENV
 
       - name: "Set up Python"
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: '3.9'
 

.github/workflows/py-test.yml

@@ -23,7 +23,7 @@ jobs:
           echo "package=$(ls -F | grep \/$ | grep -v "bin\|examples\|tests" | sed -n "s/\///g;1p")" >> $GITHUB_ENV
 
       - name: "Set up Python"
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: '3.9'
 
@@ -72,7 +72,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}