Chore: Update whatsNew link (#78066)

package.json

@@ -61,7 +61,7 @@
     "plugin:build:dev": "lerna run dev --ignore=\"@grafana/*\" --ignore=\"@grafana-plugins/input-datasource\""
   },
   "grafana": {
-    "whatsNewUrl": "https://grafana.com/docs/grafana/next/whatsnew/whats-new-in-v10-1/",
+    "whatsNewUrl": "https://grafana.com/docs/grafana/next/whatsnew/whats-new-in-v10-3/",
     "releaseNotesUrl": "https://grafana.com/docs/grafana/next/release-notes/"
   },
   "devDependencies": {