fix: add missing closing brace for batchGetChangelog function

The batchGetChangelog function was missing its closing `}`, causing
`export` statements to appear inside the function body. This made
jiti/define-config-ts fail with a ParseError when loading any
valaxy.config.ts that imports this addon, which in turn caused the
user's theme config to be silently ignored (falling back to the
default theme).

Author: YunYouJun

node/gitLog.ts

@@ -247,6 +247,7 @@ async function batchGetChangelog(resolvedBase: string, filePaths: string[], maxC
   }
 
   return result
+}
 
 /**
  * Process all pending routes in batch: 2 git commands for ALL files