ui: Add dividing line between heatmap and feeds in dashboard view (#11437)

* ui: Add dividing line between heatmap and feeds in dashboard view

I think it's necessary to add dividing line between heatmap
and feeds in dashboard view, or the first items in feed is too
near with heatmap which is not a good view.

Signed-off-by: a1012112796 <1012112796@qq.com>

* Change the implementation method

* change style

* restart ci

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

web_src/js/components/ActivityHeatmap.vue

@@ -7,6 +7,7 @@
             {{ totalContributions }} total contributions in the last 12 months
         </h4>
         <calendar-heatmap v-show="!isLoading" :locale="locale" :no-data-text="locale.no_contributions" :tooltip-unit="locale.contributions" :end-date="endDate" :values="values" :range-color="colorRange"/>
+        <div class="ui divider"></div>
     </div>
 </template>