update onboarding hint message, justify text on QR page

src/views/ContactQRScanShowView.vue

@@ -33,7 +33,7 @@
       </p>
     </div>
 
-    <div @click="onCopyToClipboard()" v-if="activeDid">
+    <div @click="onCopyToClipboard()" v-if="activeDid" class="text-center">
       <!--
         Play with display options: https://qr-code-styling.com/
         See docs: https://www.npmjs.com/package/qr-code-generator-vue3
@@ -44,9 +44,7 @@
         :dotsOptions="{ type: 'square' }"
         class="flex justify-center"
       />
-      <span class="flex justify-center">
-        Click QR to copy your contact URL to your clipboard.
-      </span>
+      <span> Click QR to copy your contact URL to your clipboard. </span>
     </div>
     <div class="text-center" v-else>
       You have no identitifiers yet, so