Update CONTRIBUTING.md

Co-authored-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: vicsn <victor.s.nicolaas@protonmail.com>

CONTRIBUTING.md

@@ -31,7 +31,7 @@ snarkVM is a big project, so (non-)adherence to best practices related to perfor
 - try to keep the sizes of `enum` variants uniform; use `Box<T>` on ones that are large
 
 ### Cross-platform consistency
-- types which contain consensus- or cryptographic logic should have a consistent size across platforms. Their serialized output should not contain `usize`, and at times it may be worth it to avoid using usize in the types themselves for clarity.
+- types which contain consensus- or cryptographic logic should have a consistent size across platforms. Their serialized output should not contain `usize`, and at times it may be worth it to avoid using `usize` in the types themselves for clarity.
 
 ### Misc. performance