fix: copilot feedback

Author: chickenn00dle

tests/donations.spec.ts

@@ -58,6 +58,7 @@ test("Donations",  {
    * Go to "My Account" page – it's now available as the reader account has been created.
    */
   await page.getByRole("link", { name: "My Account" }).click();
+  await page.waitForURL(/my-account/);
   await expect(page.locator("#newspack_account_email")).toHaveValue(
     emailAddress
   );

tests/reader-registration.spec.ts

@@ -59,6 +59,7 @@ test("Register on the site", {
    * Now the user is authenticated via the magic link, they can update their name.
    */
   await page.getByRole("link", { name: "My Account" }).click();
+  await page.waitForURL(/my-account/);
   await page.getByPlaceholder("Your First Name").click();
   await page.getByPlaceholder("Your First Name").fill("John");
   await page.getByPlaceholder("Your Last Name").click();