chore: remove stale references of ref-transform

packages/reactivity-transform/src/index.ts

@@ -1 +1 @@
-export * from './refTransform'
+export * from './reactivityTransform'

packages/reactivity-transform/src/reactivityTransform.ts

@@ -660,6 +660,6 @@ function warnOnce(msg: string) {
 
 function warn(msg: string) {
   console.warn(
-    `\x1b[1m\x1b[33m[@vue/ref-transform]\x1b[0m\x1b[33m ${msg}\x1b[0m\n`
+    `\x1b[1m\x1b[33m[@vue/reactivity-transform]\x1b[0m\x1b[33m ${msg}\x1b[0m\n`
   )
 }