Update python-builder.yml

Author: panticmilos

.github/workflows/python-builder.yml

@@ -144,7 +144,10 @@ jobs:
       - name: Install missing tkinter
         run: |
           if ('${{ matrix.platform }}' -eq 'linux-18.04') {
+            sudo apt-get update
             sudo apt-get install python3-tk
+            sudo apt-get install python-support
+            sudo update-python-modules -a
           }
 
       - name: Verbose python binary links