fix doc

Author: ota-meshi

docs/rules/experimental-script-setup-vars.md

@@ -20,7 +20,7 @@ This rule will find variables defined in `<script setup="args">` and mark them a
 This rule only has an effect when the `no-undef` rule is enabled.
 
 :::warning
-`<script setup="args">` syntax wasn't rejected by Vue's RFC. Check out the [new syntax](https://github.com/vuejs/rfcs/blob/master/active-rfcs/0040-script-setup.md).
+`<script setup="args">` syntax was rejected by Vue's RFC. Check out the [new syntax](https://github.com/vuejs/rfcs/blob/master/active-rfcs/0040-script-setup.md).
 :::
 
 ## :book: Rule Details