Update dev Version in driver.xml

Author: NicolasSouchon

guidelines/xml/driver.xml

@@ -28,7 +28,7 @@ End license statement: do not remove -->
     <teiHeader>
         <fileDesc>
             <titleStmt>
-                <title>EpiDoc Guidelines <seg type="version">9.8</seg></title>
+                <title>EpiDoc Guidelines <seg type="version">post 9.8 dev</seg></title>
             </titleStmt>
             <publicationStmt>
                 <p>Released under GNU GPL 3.0</p>