Refs #21129: Update version.md

Signed-off-by: elianalf <62831776+elianalf@users.noreply.github.com>

Author: elianalf

versions.md

@@ -55,6 +55,7 @@ Forthcoming
   * New Gather-send method is now used by default, avoiding an extra copy during the creation of the RTPS message.
   * New attribute in `SendBuffersAllocationAttributes` to configure allocation of `NetworkBuffer` vector.
   * `SenderResource` and Transport APIs now receive a collection of `NetworkBuffer` on their `send` method.
+* Migrate fastrtps namespace to fastdds
 
 Version 2.14.0
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