Use documented syntax for GitHub action conditional (#3941)

https://docs.github.com/en/actions/how-tos/write-workflows/choose-when-workflows-run/control-jobs-with-conditions
shows that the terms of the conditional need to be surrounded by `${{ }}`

Author: MarkEWaite

.github/workflows/release-drafter.yml

@@ -8,8 +8,9 @@ on:
 
 jobs:
   update_release_draft:
+    # Only draft release notes on the repo in the jenkinsci GitHub organization
+    if: ${{ github.repository_owner == 'jenkinsci' }}
     runs-on: ubuntu-latest
-    if: github.repository_owner == 'jenkinsci'
     steps:
       # https://github.com/release-drafter/release-drafter/issues/871#issuecomment-3686135188
       - name: Wait for 15 seconds to ensure GraphQL consistency