chore: Specifcy the upper bounds file to match

Author: lqiu96

renovate.json

@@ -92,7 +92,7 @@
       "matchManagers": [
         "regex"
       ],
-      "fileMatch": ["/^dependencies\\.txt$/"],
+      "fileMatch": ["dependencies.txt"],
       "matchDatasources": ["maven"],
       "groupName": "Upper Bound Dependencies File",
       "description": "Group all dependencies from the Upper Bound Dependencies File"