Fix pip installation: Install pip3 if not available

.gitea/workflows/update-laws.yaml

@@ -25,12 +25,16 @@ jobs:
       - name: Set up Python
         run: |
           python3 --version
-          python3 -m pip install --upgrade pip
+          # Install pip if not available
+          if ! command -v pip3 &> /dev/null; then
+            sudo apt-get update && sudo apt-get install -y python3-pip
+          fi
+          python3 -m pip install --upgrade pip || pip3 install --upgrade pip
 
       - name: Install dependencies
         run: |
-          pip install --upgrade pip
-          pip install -r requirements.txt
+          pip3 install --upgrade pip
+          pip3 install -r requirements.txt
 
       - name: Run update script
         run: |