fix: require admin permissions for all systemtag updates

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

apps/dav/lib/SystemTag/SystemTagNode.php

@@ -101,18 +101,10 @@ public function update($name, $userVisible, $userAssignable, $color): void {
 			if (!$this->tagManager->canUserSeeTag($this->tag, $this->user)) {
 				throw new NotFound('Tag with id ' . $this->tag->getId() . ' does not exist');
 			}
-			if (!$this->tagManager->canUserAssignTag($this->tag, $this->user)) {
-				throw new Forbidden('No permission to update tag ' . $this->tag->getId());
-			}
 
-			// only admin is able to change permissions, regular users can only rename
+			// only admin is able to update system tags
 			if (!$this->isAdmin) {
-				// only renaming is allowed for regular users
-				if ($userVisible !== $this->tag->isUserVisible()
-					|| $userAssignable !== $this->tag->isUserAssignable()
-				) {
-					throw new Forbidden('No permission to update permissions for tag ' . $this->tag->getId());
-				}
+				throw new Forbidden('No permission to update tag ' . $this->tag->getId());
 			}
 
 			// Make sure color is a proper hex