Added PMM Client version to the list of supported SW in the release notes (#244)

modified: docs/RN/Kubernetes-Operator-for-PSMONGODB-RN1.20.0.md

Author: nastena1606

docs/RN/Kubernetes-Operator-for-PSMONGODB-RN1.20.0.md

@@ -120,6 +120,7 @@ The Operator was developed and tested with the following software:
 
 * Percona Server for MongoDB 6.0.21-18, 7.0.18-11, and 8.0.8-3. 
 * Percona Backup for MongoDB 2.9.1.
+* PMM Client: 2.44.1
 
 Other options may also work but have not been tested.