fix typo

src/cap-description.adoc

@@ -663,7 +663,7 @@ or 'root' capability.
 
 The new address, after updating the address of a capability, is within the
 _representable range_ if decompressing the capability's bounds with the
-original and new addresses yields the same base and top addresses.
+original and new addresses yields the same base and top bounds.
 
 In other words, given a capability with address _a_ and the
 new address `a' = a + x`, the bounds _b_ and _t_ are decoded using _a_ and the