fix: use dynamic repository reference and update checkout action

- Use repository from environment variable for conflict PR URLs
- Update checkout action from v3 to v4 for latest features

Author: PastaPastaPasta

.github/workflows/handle_potential_conflicts.py

@@ -155,7 +155,7 @@ def main():
             conflict_details.append({
                 'number': conflict_pr_num,
                 'title': conflict_pr_json.get('title', 'Unknown'),
-                'url': conflict_pr_json.get('html_url', f'https://github.com/dashpay/dash/pull/{conflict_pr_num}')
+                'url': conflict_pr_json.get('html_url', f'https://github.com/{repo}/pull/{conflict_pr_num}')
             })
         else:
             print(f"Warning: Unexpected response for PR {conflict_pr_num} mergeability check. URL: {pre_mergeable.url}", file=sys.stderr)

.github/workflows/predict-conflicts.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           ghToken: "${{ secrets.GITHUB_TOKEN }}"
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: validate potential conflicts
         id: validate_conflicts
         run: pip3 install hjson && .github/workflows/handle_potential_conflicts.py "$conflicts"