minor updates to mysql cleanup

* take -> make
* correct incorrect details about when pool size was changed

doc/update/7.3-to-7.4.md

@@ -10,7 +10,7 @@ This document currently just serves as a place to keep track of updates that wil
 
 ## Optional optimizations for GitLab setups with MySQL databases
 
-Only applies if running MySQL database created with GitLab 6.7 or earlier. If you are not experiencing any issues you may not need the following instructions however following them will bring your database in line with the latest recommended installation configuration and help avoid future issues. Be sure to follow these directions exactly. These directions should be safe for any MySQL instance but to be sure take a current MySQL database backup beforehand.
+Only applies if running MySQL database created with GitLab 6.7 or earlier. If you are not experiencing any issues you may not need the following instructions however following them will bring your database in line with the latest recommended installation configuration and help avoid future issues. Be sure to follow these directions exactly. These directions should be safe for any MySQL instance but to be sure make a current MySQL database backup beforehand.
 
 ```
 # Secure your MySQL installation (added in GitLab 6.2)
@@ -61,7 +61,7 @@ mysql> \q
 # Update database configuration details
 # See config/database.yml.mysql for latest recommended configuration details
 #   Remove the reaping_frequency setting line if it exists (removed in GitLab 6.8)
-#   Set production -> pool: 10 (updated in GitLab 5.3 & 6.2)
+#   Set production -> pool: 10 (updated in GitLab 5.3)
 #   Set production -> username: git
 #   Set production -> password: the password your replaced $password with earlier
 sudo -u git -H editor /home/git/gitlab/config/database.yml