chore: update sponsor image [ci skip]

yyx990803 · yyx990803 · commit 896a76c2bcc2 · 2018-08-07T17:49:58.000-04:00
diff --git a/docs/.vuepress/components/Bit.vue b/docs/.vuepress/components/Bit.vue
@@ -2,7 +2,7 @@
   <p class="bit-sponsor">
     <a href="https://www.bitsrc.io/?utm_source=vue&utm_medium=vue&utm_campaign=vue&utm_term=vue&utm_content=vue" target="_blank">
       <span>This project is sponsored by</span>
-      <img alt="bit" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/bit.png">
+      <img alt="bit" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/bit-wide.png">
     </a>
   </p>
 </template>
