update sponsors

README.md

@@ -36,6 +36,10 @@ Vue.js is an MIT-licensed open source project. Its ongoing development is made p
   <img width="200px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/chaitin.png">
 </a>
 
+<a href="https://htmlburger.com/">
+  <img width="200px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/htmlburger.png">
+</a>
+
 ## Intro
 
 Vue.js is a library for building interactive web interfaces. It provides data-reactive components with a simple and flexible API. Core features include:

backers.md

@@ -29,7 +29,7 @@ You can join them in supporting  Vue.js development by [pledging on Patreon](htt
 </a>
 
 <a href="https://htmlburger.com/">
-  <img width="360px" src="http://scared-aftermath.surge.sh/htmlBurger_Vue_Logo.png">
+  <img width="360px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/htmlburger.png">
 </a>
 
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