chore: update sponsor link [ci skip]

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>
@@ -210,7 +210,7 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
     </tr><tr></tr>
     <tr>
       <td align="center" valign="middle">
-        <a href="https://www.programmers.io" target="_blank">
+        <a href="https://www.programmers.io/vuejs/" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/programmers_io.png">
         </a>
       </td>

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>
@@ -215,7 +215,7 @@ Funds donated via Patreon go directly to support Evan You's full-time work on Vu
     </tr><tr></tr>
     <tr>
       <td align="center" valign="middle">
-        <a href="https://www.programmers.io" target="_blank">
+        <a href="https://www.programmers.io/vuejs/" target="_blank">
           <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/programmers_io.png">
         </a>
       </td>