Minor improvements to Authentication docs (#18477)

Author: alfredmyers

aspnetcore/includes/IdentityServer4.md

@@ -4,11 +4,11 @@ ASP.NET Core Identity adds user interface (UI) login functionality to ASP.NET Co
 * [Azure Active Directory B2C](/azure/active-directory-b2c/active-directory-b2c-custom-rest-api-netfw) (Azure AD B2C)
 * [IdentityServer4](https://identityserver.io)
 
-IdentityServer4 is an OpenID Connect and OAuth 2.0 framework for ASP.NET Core 3.0. IdentityServer4 enables the following security features:
+IdentityServer4 is an OpenID Connect and OAuth 2.0 framework for ASP.NET Core. IdentityServer4 enables the following security features:
 
 * Authentication as a Service (AaaS)
 * Single sign-on/off (SSO) over multiple application types
 * Access control for APIs
 * Federation Gateway
 
-For more information, see [Welcome to IdentityServer4](http://docs.identityserver.io/en/latest/index.html).
+For more information, see [Welcome to IdentityServer4](https://docs.identityserver.io/en/latest/index.html).

aspnetcore/security/index.md

@@ -14,7 +14,7 @@ ASP.NET Core enables developers to easily configure and manage security for thei
 
 ## ASP.NET Core security features
 
-ASP.NET Core provides many tools and libraries to secure your apps including built-in Identity providers but you can use 3rd party identity services such as Facebook, Twitter, or LinkedIn. With ASP.NET Core, you can easily manage app secrets, which are a way to store and use confidential information without having to expose it in the code.
+ASP.NET Core provides many tools and libraries to secure your apps including built-in identity providers, but you can use third-party identity services such as Facebook, Twitter, and LinkedIn. With ASP.NET Core, you can easily manage app secrets, which are a way to store and use confidential information without having to expose it in the code.
 
 ## Authentication vs. Authorization