change jellyfin cache dir to emptyDir

clusters/default/media/jellyfin/jellyfin.yml

@@ -41,10 +41,8 @@ spec:
       - name: config
         persistentVolumeClaim:
           claimName: jellyfin-longhorn
-      - name: cache
+      - name: /cache
-        hostPath:
+        emptyDir: {}
-          path: /tmp/
-          type: Directory
       - name: media
         nfs:
           server: 10.0.0.123