ci: consolidate Dependabot skip into reusable flags-board workflow

The Dependabot skip for the feature flags project board is now handled
centrally in the reusable workflow (PostHog/.github#52). Bump the pin to
that merged SHA and drop the redundant inline `github.actor !=
'dependabot[bot]'` guard so the conditional lives in one place.

No behavior change: Dependabot PRs are still skipped (now upstream), and
the pin bump pulls in only that single workflow change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: turnipdabeets

.github/workflows/call-flags-project-board.yml

@@ -9,8 +9,8 @@ on:
 
 jobs:
     call-flags-project:
-        if: ${{ github.actor != 'dependabot[bot]' }}
-        uses: PostHog/.github/.github/workflows/flags-project-board.yml@d8b55d05dc5150f05c24542a6397ff3ecfbfb56d
+        # Dependabot is skipped by the reusable workflow itself (PostHog/.github#52).
+        uses: PostHog/.github/.github/workflows/flags-project-board.yml@69336b569d22687f8982eea6ff7d450a885cda05
         with:
             pr_number: ${{ github.event.pull_request.number }}
             pr_node_id: ${{ github.event.pull_request.node_id }}