chore: bump package version to 2.1.2 in package.json and package-lock.json

Author: kastov

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@remnawave/backend",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "description": "Remnawave Panel Backend",
   "private": false,
   "type": "commonjs",
@@ -163,4 +163,4 @@
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.32.1"
   }
-}
+}