Add comment about in-memory dynmic providers in readme file

Author: SundasChoudyRsk

README.md

@@ -18,7 +18,7 @@ The [master](https://github.com/RockSolidKnowledge/Samples.IdentityServer4.Saml2
 	- **sp:** an IdentityServer4 implementation configured to act as both a SAML Identity Provider and a SAML Service Provider
 - **DuendeIdentityServer**
 	- **DuendeIdP:** a Duende.IdentityServer implementation configured to act as a SAML Identity Provider with Service Provider configuration loaded from memory. This uses the Duende Automatic Key Management feature for signing key
-	- **DuendeDynamicProviders:** A Duende.IdentityServer implementation acting as a SAML Service Provider with dynamic identity providers
+	- **DuendeDynamicProviders:** A Duende.IdentityServer implementation acting as a SAML Service Provider with in-memory dynamic identity providers
 
 
 ## Getting Started