use next cache instead of sanity's cache

src/lib/sanity.ts

@@ -4,7 +4,7 @@ export const sanityClient = createClient({
   projectId: process.env.NEXT_PUBLIC_SANITY_PROJECT_ID!,
   dataset: process.env.NEXT_PUBLIC_SANITY_DATASET!,
   apiVersion: "2025-02-19",
-  useCdn: true,
+  useCdn: false,
 })
 
 export async function getBlogPost(slug: string) {