README*: Use absolute paths for alternate language links (#1077)

The link to switch between English and Chinese was broken when viewing
from the root of the repository.

This patch changes the relative links to absolute paths so the link
works everywhere.

Co-authored-by: McKinley <mckinley@aaathats3as.com>
Reviewed-on: #1077
Reviewed-by: James Mills <james@mills.io>
Co-authored-by: mckinley <mckinley@noreply@mills.io>
Co-committed-by: mckinley <mckinley@noreply@mills.io>

README.md

@@ -24,7 +24,7 @@
 </p>
 
 <p align="center">
-  <a href="README_ZH.md">View the chinese version of this document</a>
+  <a href="/yarnsocial/yarn/src/branch/main/README_ZH.md">View the chinese version of this document</a>
 </p>
 
 ## Installation

README_ZH.md

@@ -24,7 +24,7 @@
 </p>
 
 <p align="center">
-  <a href="README.md">英文</a>
+  <a href="/yarnsocial/yarn/src/branch/main/README.md">英文</a>
 </p>
 
 ## 安装