Use inclusive language

source/handbook/index.html

@@ -36,6 +36,7 @@ extra_css:
             <li>Do what is right for our <b>customers</b> and the rest of the GitLab community, do what is best over the long term, don't be evil.</li>
             <li>We create <b>simple</b> software to accomplish complex collaborative tasks.</li>
             <li>Do <b>not</b> make jokes or unfriendly remarks about race, ethnic origin, skin colour, gender or sexual orientation.</li>
+            <li>Use <b>inclusive</b> language. For example, prefer 'Hi everybody' to 'Hi guys'.</li>
             <li>Share problems you run into, ask for help, be forthcoming with information and <b>speak up</b>.</li>
             <li>Work out in the <b>open</b>, try to use public issue trackers and repositories when possible.</li>
             <li>Share solutions you find and answers you receive with the <b>whole community</b>.</li>