update renovate.json

Author: joreilly

renovate.json

@@ -7,8 +7,7 @@
     "schedule:daily"
   ],
   "baseBranches": [
-    "base",
-    "multimodule"
+    "main"
   ],
   "commitMessageExtra": "{{{currentValue}}} to {{#if isPinDigest}}{{{newDigestShort}}}{{else}}{{#if isMajor}}{{prettyNewMajor}}{{else}}{{#if isSingleVersion}}{{prettyNewVersion}}{{else}}{{#if newValue}}{{{newValue}}}{{else}}{{{newDigestShort}}}{{/if}}{{/if}}{{/if}}{{/if}}",
   "packageRules": [