update roadmap for 3.4

Fixes #24219

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #481)

Author: nhorman

roadmap.md

@@ -12,6 +12,19 @@ We encourage our community to follow the project's progress and participate in
 its evolution. Stay updated and engage with us through our [project board],
 where you can track real-time updates, milestones, and changes.
 
+### OpenSSL 3.4
+OpenSSL 3.4 is targeting the following enhancements:
+* Expanded use of RCU locks where appropriate for performance enhancements
+* Optimization of algorithm fetching to improve performance
+* Composite algorithm implementations
+* Implementation of Attribute Certificates
+* Elimination of the use of atexit
+* Server-side QUIC support
+
+As in our prior release the [Release Steering Comittee] will oversee the release
+cycle.  Our target release schedule can be viewed [here](https://github.com/orgs/openssl/projects/11/views/23)
+
+
 ### OpenSSL 3.3
 
 From OpenSSL 3.3 onwards, the [Release Steering Committee] oversees the release
@@ -47,4 +60,4 @@ For the latest updates, please visit our project board:
 [Release Steering Committee]:https://www.openssl.org/policies/general/release-policy.html#fn2
 [time-based release policy]:https://www.openssl.org/policies/general/release-policy.html
 [client-side support]:https://github.com/openssl/openssl/blob/openssl-3.2/README-QUIC.md
-[Cryptographic Module Validation Program]:https://csrc.nist.gov/projects/cryptographic-module-validation-program
+[Cryptographic Module Validation Program]:https://csrc.nist.gov/projects/cryptographic-module-validation-program