Update aspnetcore/security/preventing-open-redirects.md

Co-authored-by: Martin Costello <[email protected]>

Author: Rick-Anderson

aspnetcore/security/preventing-open-redirects.md

@@ -76,7 +76,7 @@ The `IUrlHelper.IsLocalUrl` method protects users from being inadvertently redir
 
 ### Detect if URL is local using `RedirectHttpResult.IsLocalUrl`
 
-The [`RedirectHttpResult.IsLocalUrl(url)`](https://source.dot.net/#Microsoft.AspNetCore.Http.Results/RedirectHttpResult.cs,c0ece2e6266cb369) helper method to detects if a URL is local. A URL is considered local if the following are true:
+The [`RedirectHttpResult.IsLocalUrl(url)`](https://source.dot.net/#Microsoft.AspNetCore.Http.Results/RedirectHttpResult.cs,c0ece2e6266cb369) helper method detects if a URL is local. A URL is considered local if the following are true:
 
 * It doesn't have the [host](https://developer.mozilla.org/docs/Web/API/URL/host) or [authority](https://developer.mozilla.org/docs/Web/URI/Authority) section.
 * It has an [absolute path](https://developer.mozilla.org/docs/Learn_web_development/Howto/Web_mechanics/What_is_a_URL#absolute_urls_vs._relative_urls).