Fix comment in default `jvm.options` configuration file (#75783)

distribution/src/config/jvm.options

@@ -24,9 +24,10 @@
 ## based on the available memory in your system and the roles
 ## each node is configured to fulfill. If specifying heap is
 ## required, it should be done through a file in jvm.options.d,
-## and the min and max should be set to the same value. For
-## example, to set the heap to 4 GB, create a new file in the
-## jvm.options.d directory containing these lines:
+## which should be named with .options suffix, and the min and
+## max should be set to the same value. For example, to set the
+## heap to 4 GB, create a new file in the jvm.options.d 
+## directory containing these lines:
 ##
 ## -Xms4g
 ## -Xmx4g