Fix invalid @Covers annotations in relay mode tests

Use fully qualified class name for @Covers annotations.

Author: pfefferle

tests/phpunit/tests/includes/class-test-options.php

@@ -64,7 +64,7 @@ public function test_delete_removes_all_activitypub_options() {
 	/**
 	 * Test enabling relay mode changes settings.
 	 *
-	 * @covers Options::relay_mode_changed
+	 * @covers \Activitypub\Options::relay_mode_changed
 	 */
 	public function test_enabling_relay_mode() {
 		// Set initial values.
@@ -89,7 +89,7 @@ public function test_enabling_relay_mode() {
 	/**
 	 * Test disabling relay mode restores settings.
 	 *
-	 * @covers Options::relay_mode_changed
+	 * @covers \Activitypub\Options::relay_mode_changed
 	 */
 	public function test_disabling_relay_mode() {
 		// Enable relay mode first.