fix(deps): update dependency @sanity/client to ^7.12.0

Author: renovate[bot]

apps/test/package.json

@@ -27,7 +27,7 @@
     "vite": "^7.1.8"
   },
   "dependencies": {
-    "@sanity/client": "^7.11.2",
+    "@sanity/client": "^7.12.0",
     "@sanity/image-url": "^1.2.0",
     "groq": "^4.10.2",
     "sanity": "^4.10.2"

packages/sanity-sveltekit/package.json

@@ -52,7 +52,7 @@
     "vitest": "^3.2.4"
   },
   "dependencies": {
-    "@sanity/client": "^7.11.2",
+    "@sanity/client": "^7.12.0",
     "@sanity/comlink": "^3.0.9",
     "@sanity/core-loader": "^1.8.18",
     "@sanity/presentation-comlink": "^1.0.29",