Make test gha workflow manually runnable (#4998)

if https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_dispatch
is to be believed this should make it possible to manually kick of test
workflow, but i don't know much about these things

.github/workflows/test.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches: [master]
   pull_request:
+  workflow_dispatch:
 
 env:
   POETRY_VERSION: "1.4.2"