update the introduction

Author: pavel-kirienko

specification/introduction/introduction.tex

@@ -241,6 +241,8 @@ \subsection{v1.0 -- work in progress}
     across multiple repositories and code can be generated from a union of said folders.
 
     \item Cyphal/UDP and Cyphal/serial transport specifications have been introduced.
+
+    \item Minor adjustments of the transport layer definitions.
 \end{itemize}
 
 \subsection{v1.0-beta -- Sep 2020}