Update react-query.mdx (#10452)

added ts file ext to match the example.
the query is written in the "index.ts" file.
wo this the query in the example doesn't get the type correctly and ts doesn't compile correctly

Author: yanky2000

website/src/pages/docs/guides/react-query.mdx

@@ -45,7 +45,7 @@ import type { CodegenConfig } from '@graphql-codegen/cli'
 
 const config: CodegenConfig = {
   schema: 'https://graphql.org/graphql/',
-  documents: ['src/**/*.tsx'],
+  documents: ['src/**/*.{ts,tsx}'],
   ignoreNoDocuments: true,
   generates: {
     './src/graphql/': {