fix(docs): correct MSSQL insert output() call order

[sleitor]

Summary

Fixes drizzle-team/drizzle-orm#5472

The insert.mdx docs show .output() called after .values(), which throws a runtime error. Per MSSQL SQL syntax (and the Drizzle API implementation), OUTPUT must come before VALUES:

-- MSSQL SQL structure:
INSERT INTO users OUTPUT INSERTED.id VALUES ('Dan')

This is confirmed by maintainer @AleksandrSherman: "The use of the output clause in mssql is based directly on the official mssql documentation... But it seems that docs have an incorrect example. We will update that."

Changes

Before:

await db.insert(users).values({ name: "Dan" }).output();
await db.insert(users).values({ name: "Partial Dan" }).output({ insertedId: users.id });

After:

await db.insert(users).output().values({ name: "Dan" });
await db.insert(users).output({ insertedId: users.id }).values({ name: "Partial Dan" });

Also corrected the description which incorrectly said "PostgreSQL and SQLite" instead of "MSSQL".