Allow org automation to delete up to 80% of users

With (Inactive users to be deleted)[#736]
we want to clean inactive users. This is the first run and it calculated
over 400 users. The org automation doesn't allow to delete so many users
at onance. This will re-configure the limit temporarily and I will
revert it after the inactive users are deleted

Author: beyhan

.github/workflows/org-management.yml

@@ -62,6 +62,7 @@ jobs:
             --github-endpoint http://ghproxy:8888
             --required-admins=thelinuxfoundation
             --min-admins=5
+            --maximum-removal-delta=0.8
             --github-app-id=${{ secrets.GH_APP_ID }}
             --github-app-private-key-path=private_key
             --require-self=false