[doc] Use markdown code format when necessary

doc/release/validation.tex

@@ -195,8 +195,11 @@ expected format is:
   # ...
 \end{lstlisting}
 
-It should only list main changes, that will be displayed on the event section
-of the website and the wiki page.
+It should only list main changes, that will be displayed on the event section of
+the website and the wiki page. Make sure to use markdown code formating
+\verb+``+ if the texte contains things that could be affected by markdown
+formatting (for example \verb+\word1_word2+ will be displayed as
+\verb+word2+ without code formatting.
 
 Create the version commit, tag it using \texttt{git tag \$(cat VERSION | sed -e "s/\textasciitilde /-/")}
 and push it (e.g. via \texttt{git push origin \$(cat VERSION | sed -e "s/\textasciitilde/-/")}).