tidy up types

Author: wikkyk

.github/workflows/run-tests.yml

@@ -4,19 +4,15 @@ on:
     inputs:
       event_name:
         required: true
-        type: string
       pr:
         required: false
         type: number
       repo:
         required: false
-        type: string
       ref:
         required: false
-        type: string
       sha:
         required: false
-        type: string
     secrets:
       GITHUB_TOKEN:
         required: true