Update README.md

Added apivault.dev website on Readme

README.md

@@ -43,6 +43,7 @@
 <div align="center">
     <sub>Alternative sites for the project (unofficials)</sub>
     <br />
+    <a href="https://apivault.dev">APIVault</a> •
     <a href="https://free-apis.github.io">Free APIs</a> •
     <a href="https://devresourc.es/tools-and-utilities/public-apis">Dev Resources</a> •
     <a href="https://www.public-apis.ml">Public APIs Site</a> •