fix typo

ui/partials/thActionButton.html

@@ -4,7 +4,7 @@
             <b class="caret"></b>
         </a>
         <ul class="dropdown-menu pull-left">
-            <li><a target="_blank" href="https://tbpl.mozilla.org/mcmerge/?cset={{resultset.revision}}&tree={{repoName}}">m-mcMerge</a></li>
+            <li><a target="_blank" href="https://tbpl.mozilla.org/mcmerge/?cset={{resultset.revision}}&tree={{repoName}}">mcMerge</a></li>
             <li><a target="_blank" href="https://secure.pub.build.mozilla.org/buildapi/self-serve/{{repoName}}/rev/{{resultset.revision}}">BuildAPI</a></li>
             <li><a target="_blank" href="" ng-click="openRevisionListWindow()">Revision URL List</a></li>
             <li><a href="" ng-click="cancelAllJobs(resultset.revision)">Cancel All Jobs</a></li>