docs: link to nightly guide

README.md

@@ -43,7 +43,9 @@
   <h3>
     <a href="https://dioxuslabs.com"> Website </a>
     <span> | </span>
-    <a href="https://dioxuslabs.com/guide"> Guide </a>
+    <a href="https://dioxuslabs.com/guide"> Guide (0.1.8) </a>
+    <span> | </span>
+    <a href="https://dioxuslabs.com/nightly/guide"> Guide (Master) </a>
     <span> | </span>
     <a href="https://github.com/DioxusLabs/example-projects"> Examples </a>
   </h3>