chore(actions): update actions/setup-python action to v4 (#214)

Author: renovate[bot]

.github/workflows/prerelease.yml

@@ -20,7 +20,7 @@ jobs:
       run: echo ::set-output name=value::${GITHUB_REF#refs/*/}
 
     - name: Setup Python 3.7
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: '3.7'
 

.github/workflows/pull_request.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: Setup Python 3.7
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: '3.7'