Replace deprecated Renovate configuration (#1979)

Author: Picnic-DevPla-Bot

.renovaterc.json

@@ -6,8 +6,8 @@
   "customManagers": [
     {
       "customType": "regex",
-      "fileMatch": [
-        "^integration-tests/.*(-init\\.patch|\\.sh)$"
+      "managerFilePatterns": [
+        "/^integration-tests/.*(-init\\.patch|\\.sh)$/"
       ],
       "matchStrings": [
         "\\b(?<packageName>[a-z0-9_.-]+?:[a-z0-9_.-]+?):(?<currentValue>[^:]+?):[a-zA-Z0-9_-]+\\b",