Make GitHub stars badge style consistent (#588)

Author: 17cupsofcoffee

templates/categories/macros.html

@@ -143,7 +143,7 @@
                     <div class="item" aria-hidden="true">
                         <div class="content">
                             <a href="https://github.com/{{owner}}/{{name}}">
-                                <img src="https://img.shields.io/github/stars/{{owner}}/{{name}}" alt="Github Stars for {{ name }}">
+                                <img src="https://img.shields.io/github/stars/{{owner}}/{{name}}?style=flat" alt="Github Stars for {{ name }}">
                             </a>
                         </div>
                     </div>