Update default scenario config

scenarios/ArMemIndex/config/IndexMemory.cfg

@@ -153,6 +153,14 @@
 # ArmarX.IndexMemory.mns.MemoryNameSystemName = MemoryNameSystem
 
 
+# ArmarX.IndexMemory.p.maxHistorySize:  The maximum size of entity histories.
+#  Attributes:
+#  - Default:            1024
+#  - Case sensitivity:   yes
+#  - Required:           no
+# ArmarX.IndexMemory.p.maxHistorySize = 1024
+
+
 # ArmarX.LoadLibraries:  Libraries to load at start up of the application. Must be enabled by the Application with enableLibLoading(). Format: PackageName:LibraryName;... or /absolute/path/to/library;...
 #  Attributes:
 #  - Default:            ""