style(scripts): fix linting errors in CDN validator

Remove unnecessary shebang and fix import group spacing in validate-no-cdn-refs.mjs to comply with n/hashbang and import-x/order rules.

Author: jdalton

scripts/validate-no-cdn-refs.mjs

@@ -1,4 +1,3 @@
-#!/usr/bin/env node
 /**
  * @fileoverview Validates that there are no CDN references in the codebase.
  *
@@ -16,6 +15,7 @@
 import { promises as fs } from 'node:fs'
 import path from 'node:path'
 import { fileURLToPath } from 'node:url'
+
 import loggerPkg from '@socketsecurity/lib/logger'
 
 const logger = loggerPkg.getDefaultLogger()