Fix typo in WebSecurityConfigurer Javadoc

Fixes: gh-7876

config/src/main/java/org/springframework/security/config/annotation/web/WebSecurityConfigurer.java

@@ -26,7 +26,7 @@ import org.springframework.security.config.annotation.web.configuration.WebSecur
 
 /**
  * Allows customization to the {@link WebSecurity}. In most instances users will use
- * {@link EnableWebSecurity} and a create {@link Configuration} that extends
+ * {@link EnableWebSecurity} and create a {@link Configuration} that extends
  * {@link WebSecurityConfigurerAdapter} which will automatically be applied to the
  * {@link WebSecurity} by the {@link EnableWebSecurity} annotation.
  *