ci: fix renovate approve condition to check PR author (#144)

github.actor reflects who triggered the event (e.g. a human reopening
the PR), not who authored it. Use github.event.pull_request.user.login
in the caller to correctly identify Renovate-authored PRs regardless
of who triggers the workflow.

Signed-off-by: jimisola <jimisola@jimisola.com>
Co-authored-by: Jimisola Laursen <jimisola.laursen@resurs.se>

Author: jimisola

.github/workflows/renovate-approve.yml

@@ -8,4 +8,5 @@ on:
 
 jobs:
   approve:
+    if: github.event.pull_request.user.login == 'renovate[bot]'
     uses: reqstool/.github/.github/workflows/renovate-approve.yml@main