fix: handle symlinked .git directories

Author: liangzhicheng0423

lib/resolveGitRepo.js

@@ -14,7 +14,8 @@ const debugLog = debug('lint-staged:resolveGitRepo')
  * submodules and worktrees
  */
 const resolveGitConfigDir = async (gitDir) => {
-  const defaultDir = normalize(path.join(gitDir, '.git'))
+  // Get the real path in case it's a symlink
+  const defaultDir = normalize(await fs.realpath(path.join(gitDir, '.git')))
   const stats = await fs.lstat(defaultDir)
   // If .git is a directory, use it
   if (stats.isDirectory()) return defaultDir