PS-9550 [DOC] Add information on PRO build 8.4.2 (#425)

modified:   docs/psmysql-pro.md

Author: alina-derkach-oaza

docs/psmysql-pro.md

@@ -9,6 +9,7 @@ Find the list of capabilities available in Percona Server for MySQL Pro:
 | Name                                | Version | Description  | 
 | ----------------------------------- | ------------- | -------------|
 | [FIPS compliance](fips.md)| 8.4.0 | Enables all commercial cloud service providers who want to sell and expand their footprint for US government entities. |
+| [FIPS compliance](fips.md)| 8.4.2 | The FIPS feature has been tested on Percona Server for MySQL Pro 8.4.2. There are no changes to this release. |
 
 ## What's in it for you?