Fix CS

Author: krzysiekpiasecki

semver.md

@@ -68,7 +68,7 @@ Each element MUST increase numerically. For instance: 1.9.0 -> 1.10.0 -> 1.11.0.
 1. Once a versioned package has been released, the contents of that version
 MUST NOT be modified. Any modifications MUST be released as a new version.
 
-1. Major version zero (0.y.z) is for initial development. Anything may change
+1. Major version zero (0.y.z) is for initial development. Anything MAY change
 at any time. The public API should not be considered stable.
 
 1. Version 1.0.0 defines the public API. The way in which the version number