Fix BoneAttachment3D signal connection

(cherry picked from commit 34574db5b9ee3188c8c0a45e9dfd0662315b1c26)

scene/3d/bone_attachment_3d.cpp

@@ -148,7 +148,7 @@ void BoneAttachment3D::_check_bind() {
 			bone_idx = sk->find_bone(bone_name);
 		}
 		if (bone_idx != -1) {
-			sk->call_deferred(SNAME("connect"), "bone_pose_changed", callable_mp(this, &BoneAttachment3D::on_bone_pose_update));
+			sk->connect(SNAME("bone_pose_changed"), callable_mp(this, &BoneAttachment3D::on_bone_pose_update));
 			bound = true;
 			call_deferred(SNAME("on_bone_pose_update"), bone_idx);
 		}