clarify "save"

src/level-ext.adoc

@@ -3,7 +3,7 @@
 
 {cheri_levels_ext_name} is an optional extension to {cheri_base_ext_name} that adds support for associating a level with capabilities and limiting flow of capabilities to specific memory region subsets.
 This extension allows assigning a level to capabilities, which in conjunction with two new permissions allows enforcing invariants on capability propagation.
-For example, this can be used to ensure that a callee cannot save a copy of the passed in argument or to avoid sharing of compartment-local data between compartments.
+For example, this can be used to ensure that a callee cannot store a copy of the passed in argument to memory or to avoid sharing of compartment-local data between compartments.
 The number of supported levels is configurable, but this specification currently only requires supporting two levels (_local_ and _global_).
 
 === Capability format changes