chore: update sponsors

Author: Guillaume Chau

README.md

@@ -19,6 +19,10 @@
   <a href="https://vueschool.io/" target="_blank">
     <img src="https://vueschool.io/img/logo/vueschool_logo_multicolor.svg" alt="VueSchool logo" width="200px">
   </a>
+
+  <a href="https://www.vuemastery.com/" target="_blank">
+    <img src="https://cdn.discordapp.com/attachments/258614093362102272/557267759130607630/Vue-Mastery-Big.png" alt="Vue Mastery logo" width="200px">
+  </a>
 </p>
 
 ### Bronze
@@ -27,6 +31,10 @@
   <a href="https://vuetifyjs.com" target="_blank">
     <img src="https://cdn.discordapp.com/attachments/537832759985700914/537832771691872267/Horizontal_Logo_-_Dark.png" width="100">
   </a>
+
+  <a href="https://www.frontenddeveloperlove.com/" target="_blank" title="Frontend Developer Love">
+    <img src="https://cdn.discordapp.com/attachments/258614093362102272/557267744249085953/frontend_love-logo.png" width="56">
+  </a>
 </p>
 
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