Update src/borrow_check/region_inference/lifetime_parameters.md

Co-Authored-By: lqd <remy.rakic+github@gmail.com>

Author: 2 people

src/borrow_check/region_inference/lifetime_parameters.md

@@ -103,7 +103,7 @@ rise to an outlives constraint `'a: 'b`. Combined with our default liveness
 constraints we get:
 
 ```
-'a live at {B, end('a)} // B represents the "bunction body"
+'a live at {B, end('a)} // B represents the "function body"
 'b live at {B, end('b)}
 'a: 'b
 ```