Put back the docblock space pint took on the way past

One character in a @return line of webhooks(), untouched by anything this
branch does. It was only reformatted because the file happened to be on
the pint path of the prefix-rule commit. A style fix to an unrelated line
is noise in a diff a reviewer reads line by line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/Services/Stripe/StripeCheck.php

@@ -68,7 +68,7 @@ final class StripeCheck
      * valid while the endpoint listens for the wrong five events, and nothing
      * fails until a payment is not recorded.
      *
-     * @return array<int, array<string, mixed>>|null null when the key may not read them
+     * @return array<int, array<string, mixed>>|null  null when the key may not read them
      */
     private function webhooks(string $secret): ?array
     {