cicd: auto-merge approved dependabot PRs

Signed-off-by: Hank Donnay <hdonnay@redhat.com>

Author: hdonnay

.github/workflows/fast-forward.yml

@@ -3,11 +3,21 @@ name: Fast Forward
 on:
   issue_comment:
     types: [created, edited]
+  pull_request_review:
+    types: [submitted]
 jobs:
   fast-forward:
-    # Only run if the comment contains the /fast-forward command.
-    if: ${{ contains(github.event.comment.body, '/fast-forward')
-            && github.event.issue.pull_request }}
+    # Only run if the comment or approval contains the /fast-forward command,
+    # or if it was a dependabot PR.
+    if: >-
+      ${{
+      ( github.event.issue.pull_request && contains(github.event.comment.body, '/fast-forward')) ||
+      (
+        github.event.review && github.event.review.state == 'approved' && (
+          github.event.pull_request.user.url == 'https://api.github.com/users/dependabot%5Bbot%5D' ||
+          contains(github.event.review.body, '/fast-forward')
+        ))
+      }}
     runs-on: ubuntu-latest
 
     permissions: