[protocol spec] Correct Kexin Hu's name.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

protocol/protocol.tex

@@ -14563,7 +14563,7 @@ The authors would like to thank everyone with whom they have discussed the
 includes Mike Perry, isis agora lovecruft, Leif Ryge, Andrew Miller, Ben Blaxill,
 Samantha Hulsey, Alex Balducci, Jake Tarren, Solar Designer, Ling Ren,
 John Tromp, Paige Peterson, jl777, Alison Stevenson, Maureen Walsh,
-Filippo Valsorda, Zaki Manian, Tracy Hu, Brian Warner, Mary Maller,
+Filippo Valsorda, Zaki Manian, Kexin Hu, Brian Warner, Mary Maller,
 Michael Dixon, Andrew Poelstra, Benjamin Winston, Josh Cincinnati,
 Kobi Gurkan, Weikeng Chen, Henry de Valence, Deirdre Connolly, Chelsea Komlo,
 Zancas Wilcox, Jane Lusby, Teor, Izaak Meckler, Zac Williamson, Vitalik Buterin,
@@ -14641,6 +14641,13 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \intropart
 \lsection{Change History}{changehistory}
 
+\historyentry{2022.3.6}{}
+
+\begin{itemize}
+    \item Correct Kexin Hu's name.
+\end{itemize}
+
+
 \historyentry{2022.3.5}{2022-08-02}
 \begin{itemize}
 \nufive{
@@ -16341,7 +16348,7 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \begin{itemize}
     \item Split the descriptions of \shaHash and \shaCompress\sapling{, and of $\BlakeTwoGeneric$,}
           into their own sections. Specify \shaCompress more precisely.
-    \item Add Tracy Hu to acknowledgements\sapling{ (for the idea of explicitly
+    \item Add Kexin Hu to acknowledgements\sapling{ (for the idea of explicitly
           encoding the root of the \Sapling \noteCommitmentTree in \blockHeaders)}.
     \item Move bit/byte/integer conversion primitives into \crossref{endian}.
 \sapling{