Update validation.md (#4458)

schema is not a variable here, and yourSchema is unused. I believe the form input here should be schema={yourSchema}

Co-authored-by: Heath C <51679588+heath-freenome@users.noreply.github.com>

packages/docs/docs/usage/validation.md

@@ -88,7 +88,7 @@ import * as precompiledValidator from 'path_to/yourCompiledSchema';
 
 const validator = createPrecompiledValidator(precompiledValidator as ValidatorFunctions);
 
-render(<Form schema={schema} validator={validator} />, document.getElementById('app'));
+render(<Form schema={yourSchema} validator={validator} />, document.getElementById('app'));
 ```
 
 ### Dynamically pre-compiling validators