fix(notifciations): only notify users with access to board on mentions

fix(notifciations): only notify users with access to board on mentions

Signed-off-by: Jonas <jonas@freesources.org>

[skip ci]

Author: mejo-

tests/unit/Notification/NotificationHelperTest.php

@@ -489,8 +489,8 @@ public function testSendMention() {
 		$comment->expects($this->once())
 			->method('getMentions')
 			->willReturn([
-				['id' => 'user1'],
-				['id' => 'user2']
+				['id' => 'user1', 'type' => 'users'],
+				['id' => 'user2', 'type' => 'users'],
 			]);
 		$card = new Card();
 		$card->setId(123);
@@ -503,6 +503,13 @@ public function testSendMention() {
 			->method('findBoardId')
 			->with(123)
 			->willReturn(1);
+		$this->permissionService->expects($this->once())
+			->method('findUsers')
+			->with(1)
+			->willReturn([
+				'user1' => $this->createUserMock('user1'),
+				'user2' => $this->createUserMock('user2'),
+			]);
 
 		$notification1 = $this->createMock(INotification::class);
 		$notification1->expects($this->once())->method('setApp')->with('deck')->willReturn($notification1);