_content/doc/tutorial: fix number of rows in database-access.md

"Add three rows with values" should be "Add four rows with values".

Change-Id: I82103908292faf95c1b6c62ca57d6f47b0249ccb
GitHub-Last-Rev: 2a02403
GitHub-Pull-Request: #126
Reviewed-on: https://go-review.googlesource.com/c/website/+/385594
Reviewed-by: DO NOT USE <[email protected]>
Trust: Dmitri Shuralyov <[email protected]>

Author: wuchihsu

_content/doc/tutorial/database-access.md

@@ -159,7 +159,7 @@ but most DBMSes have their own CLI with similar features.
     *   Create an `album` table with four columns: `title`, `artist`, and `price`.
         Each row's `id` value is created automatically by the DBMS.
 
-    *   Add three rows with values.
+    *   Add four rows with values.
 
 7. From the `mysql` command prompt, run the script you just created.