chore(deps): update dependency @google/genai to ^1.51.0

Author: renovate[bot]

bun.lock

@@ -55,7 +55,7 @@
     "vitest": "^3.2.4"
   },
   "optionalDependencies": {
-    "@google/genai": "^1.50.1"
+    "@google/genai": "^1.51.0"
   },
   "engines": {
     "node": ">=22"