Merge pull request #20332 from kbhawkey/fix-duplicate-slack-text-kb

fix duplicate Slack name, header

Author: k8s-ci-robot

layouts/partials/header.html

@@ -60,7 +60,7 @@ <h5 class="github-invite">{{ T "main_community_explore" }}</h5>
                 <div class="social">
                     <a href="https://twitter.com/kubernetesio" class="twitter"><span>{{ T "community_twitter_name" }}</span></a>
                     <a href="https://github.com/kubernetes/kubernetes" class="github"><span>{{ T "community_github_name" }}</span></a>
-                    <a href="http://slack.k8s.io/" class="slack"><span>{{ T "community_slack_name" }} Slack</span></a>
+                    <a href="http://slack.k8s.io/" class="slack"><span>{{ T "community_slack_name" }}</span></a>
                     <a href="https://stackoverflow.com/questions/tagged/kubernetes" class="stack-overflow"><span>{{ T "community_stack_overflow_name" }}</span></a>
                     <a href="https://www.youtube.com/kubernetescommunity" class="youtube"><span>{{ T "community_youtube_name" }}</span></a>
                     <a href="https://discuss.kubernetes.io" class="mailing-list"><span>{{ T "community_forum_name" }}</span></a>