Fix unclosed table call in SingleStore schema examples

[meliharik]

The SingleStore schema example closes singlestoreTable(...) with }; instead of });, so the call is never closed. It appears in three files:

• singlestore/drizzle-kit-generate.mdx:41
• singlestore/drizzle-kit-push.mdx:43
• singlestore/drizzle-kit-pull.mdx:52

 export const users = p.singlestoreTable("users", {
   id: p.int().primaryKey().autoincrement(),
   name: p.varchar({ length: 255 }),
   email: p.varchar({ length: 255 }).unique(),
-};
+});

The MySQL versions of the same three pages have the identical snippet with }); at the same line, so this looks like it was missed when the SingleStore pages were derived from them.