Update Guide.docc/Guidance.md

Co-authored-by: Konrad `ktoso` Malawski <[email protected]>

Author: mattmassicotte

Guide.docc/Guidance.md

@@ -40,7 +40,7 @@ keep your changes contained.
 
 ## Enable Complete Checking
 
-Don't move directly from Swift 5 with no checking to the Swift 6 language mode.
+You don't have to directly from Swift 5 with no checking to the Swift 6 language mode.
 Instead, first begin by [enabling complete checking][] for a
 module that currently still using the Swift 5 mode.
 This will surface any potential data safety issues as