stop running top issues workflow in forks (#1376)

Author: chvima

.github/workflows/misc_top_issues.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   get-top-issues:
+    if: github.repository_owner == 'diggerhq'
     runs-on: ubuntu-latest
     steps:
       - name: update-top-issues