feat: Update auth screens (#11108)

# Pull Request Template

## Description

This PR includes style updates for auth screens

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/v3/views/auth/signup/components/Testimonials/TestimonialCard.vue

@@ -23,12 +23,12 @@ export default {
 
 <template>
   <div
-    class="flex flex-col items-start justify-center p-6 w-80 bg-white rounded-lg drop-shadow-md dark:bg-slate-800"
+    class="flex flex-col items-start justify-center p-6 w-80 bg-n-background rounded-lg drop-shadow-md"
   >
-    <p class="text-sm text-slate-600 dark:text-woot-50 tracking-normal">
+    <p class="text-sm text-n-slate-12 tracking-normal">
       {{ reviewContent }}
     </p>
-    <div class="flex items-center mt-4 text-slate-700 dark:text-woot-50">
+    <div class="flex items-center mt-4 text-n-slate-12">
       <div class="bg-white rounded-full p-1">
         <img :src="authorImage" class="h-8 w-8 rounded-full" />
       </div>