Manually install Python

.gitea/workflows/ci-pipeline.yaml

@@ -15,8 +15,14 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Python
-      uses: actions/setup-python@v5
+    - name: Install Python
+      run: |
+        sudo apt-get update
+        sudo apt-get install python3 python3-venv python3-pip -y
+
+    - name: Check Python Version
+      run: |
+        python3 --version
 
     - name: Create virtual environment
       run: |