Fix package-lock.json path in build images workflow

Author: ajhai

.github/workflows/docker-images.yml

@@ -46,7 +46,7 @@ jobs:
         with:
           node-version: 20
           cache: "npm"
-          cache-dependency-path: "llmstack/llmstack/client/package-lock.json"
+          cache-dependency-path: "llmstack/client/package-lock.json"
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action