Update training-slides/src/deconstructing-send-arc-mutex.md

Co-authored-by: Jonathan Pallant <[email protected]>

training-slides/src/deconstructing-send-arc-mutex.md

@@ -52,7 +52,7 @@ Two allowable options:
 
 ## Why `F: 'static` and `T: 'static`?
 
-* applies to data passed from parent thread to child thread or vise versa
+* applies to data passed from parent thread to child thread or vice-versa
 * prevents passing references to local variables
   * one thread can finish before the other and such references may become invalid
   * `+ 'static` lets borrow checker detect these situations at compile time