fix(deps): update dependency next-sanity to v12

Author: renovate[bot]

bun.lock

@@ -56,7 +56,7 @@
     "mdast-util-mdx-jsx": "^3.2.0",
     "motion": "^12.23.12",
     "next": "15.5.9",
-    "next-sanity": "^11.4.2",
+    "next-sanity": "^12.0.0",
     "nuqs": "^2.3.1",
     "react": "^19.2.3",
     "react-dom": "^19.2.3",