[FedCM] Rename WPT test

Change-Id: I6f9a763665f14d43e60145ecebc650b4972c1433
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4764288
Commit-Queue: Christian Biesinger <cbiesinger@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1181704}
diff --git a/credential-management/fedcm-not-observer-by-service-worker.https.html b/credential-management/fedcm-not-observed-by-service-worker.https.html
similarity index 100%
rename from credential-management/fedcm-not-observer-by-service-worker.https.html
rename to credential-management/fedcm-not-observed-by-service-worker.https.html