Fix Renovate configuration (#168)

Remove trailing `,`.

Author: martincostello

.github/renovate.json

@@ -17,7 +17,7 @@
       "customType": "regex",
       "description": "Update _VERSION variables in scripts",
       "managerFilePatterns": ["*.ps1", "*.sh"],
-      "matchStrings": ["# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))?(?: packageName=(?<packageName>.+?))?(?: versioning=(?<versioning>[a-z-]+?))?\\s.+?_version=(?<currentValue>.+?)\\s"],
+      "matchStrings": ["# renovate: datasource=(?<datasource>[a-z-]+?)(?: depName=(?<depName>.+?))?(?: packageName=(?<packageName>.+?))?(?: versioning=(?<versioning>[a-z-]+?))?\\s.+?_version=(?<currentValue>.+?)\\s"]
     }
   ],
   "labels": [