Update src/usage/schema.md

Co-authored-by: Josh Soref <[email protected]>

src/usage/schema.md

@@ -5,5 +5,5 @@ Did you land here because of cryptic errors? Then please install the following o
 
 Once you are sure this is an error in act, please look for existing issues or visit https://github.com/nektos/act/issues/new/choose to report a new issue.
 
-_Act's built-in schema validation errors are not easy to understand while keeping the development effort reasonable for open source_
+_Act's built-in schema validation errors are not easy to understand while keeping the development effort reasonable for open source._