Update src/specify_cli/__init__.py

Remove hardcoded string.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: markuswondrak

src/specify_cli/__init__.py

@@ -1531,7 +1531,7 @@ def init(
             manifest.save()
 
             # Write .specify/integration.json
-            integration_json = project_path / ".specify" / "integration.json"
+            integration_json = project_path / INTEGRATION_JSON
             integration_json.parent.mkdir(parents=True, exist_ok=True)
             integration_json.write_text(
                 json.dumps(