Add a link to the "OpenIddict 6.0 general availability" post

Author: kevinchalet

README.md

@@ -59,6 +59,7 @@ Instead, **developers are encouraged to execute the conformance tests against th
 
 **Looking for additional resources to help you get started with OpenIddict?** Don't miss these interesting blog posts:
 
+- **[OpenIddict 6.0 general availability](https://kevinchalet.com/2024/12/17/openiddict-6-0-general-availability/)** by [Kévin Chalet](https://github.com/kevinchalet)
 - **[OpenIddict on AWS Serverless: Flexible OAuth2/OIDC Provider](https://www.ganhammar.se/posts/openiddict-on-aws-serverless-flexible-oauth2-oidc-provider)** by [Anton Ganhammar](https://github.com/ganhammar)
 - **[OpenIddict 5.0 general availability](https://kevinchalet.com/2023/12/18/openiddict-5-0-general-availability/)** by [Kévin Chalet](https://github.com/kevinchalet)
 - **[Introducing native applications, per-client token lifetimes and client assertions support in OpenIddict 5.0 preview1](https://kevinchalet.com/2023/10/20/introducing-native-applications-per-client-token-lifetimes-and-client-assertions-support-in-openiddict-5-0-preview1/)** by [Kévin Chalet](https://github.com/kevinchalet)