edit url one more time

src/unsafe-pr-checkout-helper.ts

@@ -76,7 +76,7 @@ export function assertSafePrCheckout(input: IUnsafePrCheckoutInput): void {
       `This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch ` +
       `cache scope, and runner access. Fetching and executing a fork's code in that trusted ` +
       `context commonly leads to "pwn request" vulnerabilities. To opt in after reviewing ` +
-      `the risks at https://gh.io/securely-using-pull-request-checkout, set ` +
+      `the risks at https://gh.io/securely-using-pull_request_target, set ` +
       `'allow-unsafe-pr-checkout: true' on the actions/checkout step.`
   )
 }