Update index.html

Co-authored-by: Martin Thomson <mt@lowentropy.net>

index.html

@@ -279,10 +279,10 @@ <h3 id="unacceptablebehavior">
               <!-- https://rationalwiki.org/wiki/Gish_Gallop -->
               <li>overwhelming a debate with many weak arguments in an
               attempt to cause others to waste time refuting them
-              (<dfn>Gish Galloping</dfn>),
+              (<dfn>Gish Galloping</dfn>), or
               </li>
               <!-- https://rationalwiki.org/wiki/Argumentum_ad_nauseam -->
-              <li>or repeatedly making claims already shown to be false
+              <li>repeatedly making claims already shown to be false
               (<dfn lang=la>argumentum ad nauseam</dfn>).
               </li>
             </ul>