fix: dashboard-guide docs missing screenshots

Author: danh91

apps/web/public/docs/karrio-dashboard-overview.png

@@ -24,7 +24,7 @@ The Karrio dashboard is your complete control center for managing shipping opera
   </div>
   <div className="bg-white dark:bg-gray-800 rounded border overflow-hidden">
     <img
-      src="/docs/karrio-dashboard-test-mode.png"
+      src="/docs/karrio-dashboard-overview.png"
       alt="Karrio dashboard showing main navigation and quick actions"
       className="w-full h-auto"
     />

apps/web/src/app/docs/developing/dashboard-guide/page.mdx

@@ -24,7 +24,7 @@ Karrio provides separate test and live environments to help you develop and test
   </div>
   <div className="bg-white dark:bg-gray-800 rounded border overflow-hidden">
     <img
-      src="/docs/karrio-mode-switcher.png"
+      src="/docs/karrio-dashboard-test-mode.png"
       alt="Dashboard showing test mode toggle and live mode indicator"
       className="w-full h-auto"
     />