chore: update sponsors [ci skip] (#10750)

Author: vue-bot

BACKERS.md

@@ -21,7 +21,7 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
     <img width="260px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/stdlib.png">
   </a>
 </p>
-
+  
 <!--special end-->
 
 <h2 align="center">Platinum via Patreon</h2>
@@ -225,15 +225,22 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
         </a>
       </td>
       <td align="center" valign="middle">
-        <a href="https://staffaugmentation.ro/en" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/staff_augmentation.png">
+        <a href="http://www.pullrequest.com" target="_blank">
+          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/pullrequest.svg">
+        </a>
+      </td>
+      <td align="center" valign="middle">
+        <a href="https://unicorn.io/" target="_blank">
+          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/unicorn_io.svg">
         </a>
       </td>
       <td align="center" valign="middle">
         <a href="https://piratebay.ink" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/piratebay_proxy.png">
         </a>
       </td>
+    </tr><tr></tr>
+    <tr>
       <td align="center" valign="middle">
         <a href="https://www.programmers.io" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/programmers_io.png">

README.md

@@ -31,7 +31,7 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
     <img width="260px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/stdlib.png">
   </a>
 </p>
-
+  
 <!--special end-->
 
 <h3 align="center">Platinum Sponsors</h3>
@@ -230,15 +230,22 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
         </a>
       </td>
       <td align="center" valign="middle">
-        <a href="https://staffaugmentation.ro/en" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/staff_augmentation.png">
+        <a href="http://www.pullrequest.com" target="_blank">
+          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/pullrequest.svg">
+        </a>
+      </td>
+      <td align="center" valign="middle">
+        <a href="https://unicorn.io/" target="_blank">
+          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/unicorn_io.svg">
         </a>
       </td>
       <td align="center" valign="middle">
         <a href="https://piratebay.ink" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/piratebay_proxy.png">
         </a>
       </td>
+    </tr><tr></tr>
+    <tr>
       <td align="center" valign="middle">
         <a href="https://www.programmers.io" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/programmers_io.png">