Use specific Python version known to not cause errors in GitHub workflow

Author: Raven

.github/workflows/build.yml

@@ -15,8 +15,8 @@ jobs:
 
     - name: Set up Python
       uses: actions/setup-python@v2
-      with:
-        python-version: '3.x'
+      with: 
+        python-version: '3.12.2'
 
     - name: Install dependencies
       run: |