Do not specify python versions in CI

Author: goggle

.github/workflows/addoncheck-matrix.yml

@@ -8,11 +8,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.10.9
-      uses: actions/setup-python@v1
-      with:
-        python-version: 3.10.9
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v4
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/addoncheck-nexus.yml

@@ -8,11 +8,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.10.9
-      uses: actions/setup-python@v1
-      with:
-        python-version: 3.10.9
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v4
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/flake8.yml

@@ -8,11 +8,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python 3.10.9
-      uses: actions/setup-python@v1
-      with:
-        python-version: 3.10.9
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v4
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip