improved password security references for PMM2 (#3539)

* improved password security references for PMM2

* typo

documentation/docs/setting-up/client/mysql.md

@@ -26,19 +26,27 @@ Check that:
 
 ## Create a database account for PMM
 
-It is good practice to use a non-superuser account to connect PMM Client to the monitored database instance. This example creates a database user with name `pmm`, password `pass`, and the necessary permissions.
+For security, connect PMM Client to your database using a dedicated monitoring user with limited permissions. This example creates a pmm user account that has just enough access to collect monitoring data without full administrative privileges.
+
+!!! warning "Password security"
+    - Use a strong, unique password for the PMM database user
+    - At least 12 characters long
+    - Mix of uppercase and lowercase letters
+    - Include numbers and special characters
+    - Avoid common words or patterns
+    - Never use default, test, or example passwords in production
 
 === "MySQL 8.0"
 
     ```sql
-    CREATE USER 'pmm'@'127.0.0.1' IDENTIFIED BY 'pass' WITH MAX_USER_CONNECTIONS 10;
+    CREATE USER 'pmm'@'127.0.0.1' IDENTIFIED BY '<your_strong_password>' WITH MAX_USER_CONNECTIONS 10;
     GRANT SELECT, PROCESS, REPLICATION CLIENT, RELOAD, BACKUP_ADMIN ON *.* TO 'pmm'@'127.0.0.1';
     ```
 
 === "MySQL 5.7"
 
     ```sql
-    CREATE USER 'pmm'@'127.0.0.1' IDENTIFIED BY 'pass' WITH MAX_USER_CONNECTIONS 10;
+    CREATE USER 'pmm'@'127.0.0.1' IDENTIFIED BY '<your_strong_password' WITH MAX_USER_CONNECTIONS 10;
     GRANT SELECT, PROCESS, REPLICATION CLIENT, RELOAD ON *.* TO 'pmm'@'127.0.0.1';
     ```
 

documentation/overrides/main.html

@@ -2,7 +2,7 @@
 {% extends "base.html" %}
 
 {% block announce %}
- PMM 2 is no longer actively developed. We recommend using PMM 3 for improved features and better performance.</strong>.
+ PMM 2 is no longer actively developed. We recommend using PMM 3 for improved features and better performance.</strong>
 {% endblock %}
 
 {% block scripts %}