fix config-loader

apps/app/src/server/service/config-loader.ts

@@ -336,7 +336,7 @@ const ENV_VAR_NAME_TO_CONFIG_INFO = {
   },
   DISABLE_LINK_SHARING: {
     ns:      'crowi',
-    key:     'security:disableSharing',
+    key:     'security:disableLinkSharing',
     type:    ValueType.BOOLEAN,
     default: false,
   },