docs(next-auth-migration): fix 'accounts' typo

docs/content/docs/guides/next-auth-migration-guide.mdx

@@ -42,9 +42,9 @@ export const auth = betterAuth({
 });
 ```
 
-#### Accounts Schema
+#### Account Schema
 
-Map these fields in the accounts schema:
+Map these fields in the account schema:
 
 - `providerAccountId` → `accountId`
 - `refresh_token` → `refreshToken`
@@ -57,7 +57,7 @@ Remove the `session_state`, `type`, and `token_type` fields, as they are not req
 ```typescript title="auth.ts"
 export const auth = betterAuth({
     // Other configs
-    accounts: {
+    account: {
         fields: {
             accountId: "providerAccountId",
             refreshToken: "refresh_token",