Bump timeout to 4 minutes, b2bua tests might take up to 3 minutes

to complete so it's on the edge.

Author: sobomax

.github/workflows/.main.yml

@@ -17,7 +17,7 @@ on:
       python-versions:
         required: false
         type: string
-        default: '["3.12"]'
+        default: '["3.x"]'
       rtppc-types:
         required: true
         type: string
@@ -199,7 +199,7 @@ jobs:
 
       - name: Run tests
         id: run_tests
-        timeout-minutes: 3
+        timeout-minutes: 4
         run: voiptests-run-ssut-tests
 
       - name: Upload test logs