ci: fix e2e runner name (#19)

Author: bferenc

.github/workflows/e2e_testing.yaml

@@ -71,9 +71,9 @@ jobs:
           name: extension
           path: extension.zip
   e2e:
+    runs-on: ubuntu-latest-16-cores-core-extension
     needs: build
     name: Run E2E Smoke Tests
-    runs-on: ubuntu-latest-16-cores
     environment: e2e
     env:
       RUNNER: CI