Merge pull request #36049 from nextcloud/backport/36047/stable25

[stable25] fix cache key used to verify shared mountpoints

Author: PVince81

apps/files_sharing/lib/SharedMount.php

@@ -104,7 +104,7 @@ private function verifyMountPoint(
 		array $mountpoints,
 		CappedMemoryCache $folderExistCache
 	) {
-		$cacheKey = $this->user->getUID() . '/' . $share->getTarget();
+		$cacheKey = $this->user->getUID() . '/' . $share->getId();
 		$cached = $this->cache->get($cacheKey);
 		if ($cached !== null) {
 			return $cached;