chore: update devtools-next info [ci skip]

Author: yyx990803

README.md

@@ -1,10 +1,6 @@
-# Try the next iteration of Vue Devtools
+# Try the next iteration of Vue Devtools!
 
-We have a brand new version of Devtools being developed at [vuejs/devtools-next](https://github.com/vuejs/devtools-next).
-
-It only supports Vue 3 and must be used in the form of a Vite plugin or an Electron app. **If you are using Vue 3 + Vite, we strongly recommend [giving it a try](https://devtools-next.vuejs.org/).**
-
-Browser extension for devtools-next is being worked on and will be available in the future.
+We have a brand new version of Devtools being developed at [vuejs/devtools-next](https://github.com/vuejs/devtools-next). It is now in beta, please help us [test it out](https://devtools-next.vuejs.org/getting-started/installation)!
 
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