Fix GRPKEY cluster in PICSGenerator (project-chip#33963)

* Fix GRPKEY cluster in PICSGenerator

- Group Key Management cluster was incorrectly mapped,
  leading to errors.

This PR:

- Fixes the mapping of GroupKeyManagement cluster

Testing done:

- Ran PICSGenerator against my product after changes,
  got no error where there previously was one.

* Fix formatting, address review comment

---------

Co-authored-by: Andrei Litvin <andy314@gmail.com>

Author: 2 people

src/tools/PICS-generator/PICSGenerator.py

@@ -50,7 +50,7 @@ def GenerateDevicePicsXmlFiles(clusterName, clusterPicsCode, featurePicsList, at
     elif "On/Off" == clusterName:
         clusterName = clusterName.replace("/", "-")
 
-    elif "Group Key Management" == clusterName:
+    elif "GroupKeyManagement" == clusterName:
         clusterName = "Group Communication"
 
     elif "Wake On LAN" == clusterName or "Low Power" == clusterName: