Add errata about pmix_device_type_t type changes

https://github.com/pmix/pmix-standard/pull/500/files#r1592860645

Signed-off-by: Aurélien Bouteiller <bouteill@icl.utk.edu>

Chap_Revisions.tex

@@ -1472,7 +1472,8 @@ \subsection{Errata}
 The following errors were corrected in v5.1:
 
 \begin{compactitemize}
-  \item Parameter type for the key argument in \refapi{PMIx_Get} has been changed from \refstruct{pmix_key_t} to \code{char []} so that it is uniform with the argument in \refapi{PMIx_Get_nb}.
+  \item Parameter type for the key argument in \refapi{PMIx_Get} has been changed from \refstruct{pmix_key_t} to \code{char []} so that it is uniform with the argument in \refapi{PMIx_Get_nb}. It as already correct in the ABI.
+  \item Type definition for \refstruct{pmix_devce_type_t} changed from \code{uint16_t} to \code{uint64_t}. It was already correct in the ABI.
 \end{compactitemize}
 
 \subsection{Added Functions (Provisional)}