Apply joshtriplett's suggestion

Co-authored-by: Josh Triplett <[email protected]>

Author: ehuss

src/types/numeric.md

@@ -42,6 +42,6 @@ within an object along with one byte past the end.
 `usize` and `isize` are at least 16-bits wide.
 
 > **Note**: Many pieces of Rust code may assume that pointers, `usize`, and
-> `isize` are at least 32-bit and at most 64-bit. As a consequence, 16-bit
+> `isize` are either 32-bit or 64-bit. As a consequence, 16-bit
 > pointer support is limited and may require explicit care and acknowledgment
 > from a library to support.