refactor: use getRootPath helper in fix.mjs

Standardize path resolution using common utility

Author: jdalton

scripts/fix.mjs

@@ -3,11 +3,10 @@
  */
 
 import { spawn } from 'node:child_process'
-import path from 'node:path'
-import { fileURLToPath } from 'node:url'
 
-const __dirname = path.dirname(fileURLToPath(import.meta.url))
-const rootPath = path.join(__dirname, '..')
+import { getRootPath } from './utils/common.mjs'
+
+const rootPath = getRootPath(import.meta.url)
 
 // Pass through to lint.mjs with --fix flag
 const args = ['run', 'lint', '--fix', ...process.argv.slice(2)]