Update main/acle.md

Co-authored-by: Sander de Smalen <sander.desmalen@arm.com>

main/acle.md

@@ -4603,7 +4603,7 @@ as it needs, and it is the compiler's responsibility to manage the
 register allocation.
 
 However, there are some pieces of architectural state for which this
-approach is not appropriate. For example, [SME's ZA](#za-storage) is a
+approach is not suitable. For example, [SME's ZA](#za-storage) is a
 single piece of storage: there are not multiple ZAs, and so it does
 not make sense for a C or C++ function to have multiple ZA objects.
 It would also be inefficient to copy state from one ZA object to another.