Updated billing icon in nav bar

no issue

- Replaced placeholder icon with new billing icon

ghost/admin/app/components/gh-nav-menu.hbs

@@ -101,7 +101,7 @@
                 {{#if this.showBilling}}
                     <li class="relative">
                         <a href="javascript:void(0)" {{action "toggleBillingModal"}} data-test-nav="billing">
-                            {{svg-jar "house"}} View billing
+                            {{svg-jar "credit-card"}} View billing
                         </a>
                     </li>
                     <li class="relative gh-nav-pro">

ghost/admin/public/assets/icons/credit-card.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 17 17" fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M1.594 3.156c-.31 0-.563.252-.563.563v9.562c0 .31.252.563.563.563h13.812c.31 0 .563-.252.563-.563V3.72c0-.31-.252-.563-.563-.563H1.594zM.03 3.72c0-.863.7-1.563 1.563-1.563h13.812c.863 0 1.563.7 1.563 1.563v9.562c0 .863-.7 1.563-1.563 1.563H1.594c-.863 0-1.563-.7-1.563-1.563V3.72z" fill="currentColor"/><path fill-rule="evenodd" clip-rule="evenodd" d="M6.375 6.344c-1.19 0-2.156.965-2.156 2.156 0 1.19.965 2.156 2.156 2.156 1.19 0 2.156-.965 2.156-2.156 0-1.19-.965-2.156-2.156-2.156zM3.219 8.5c0-1.743 1.413-3.156 3.156-3.156S9.531 6.757 9.531 8.5s-1.413 3.156-3.156 3.156S3.219 10.243 3.219 8.5z" fill="currentColor"/><path fill-rule="evenodd" clip-rule="evenodd" d="M9.68 5.492c.632-.201 1.313-.198 1.944.01.63.208 1.18.61 1.57 1.148.389.538.598 1.186.598 1.85 0 .664-.21 1.312-.599 1.85-.39.538-.938.94-1.57 1.148-.63.208-1.31.211-1.944.01-.633-.202-1.186-.598-1.581-1.132-.164-.222-.117-.535.105-.7.222-.163.535-.116.7.106.269.365.647.635 1.08.773.432.137.897.135 1.328-.007.43-.142.806-.416 1.072-.784.266-.368.41-.81.41-1.264 0-.454-.144-.896-.41-1.264s-.641-.642-1.072-.784c-.431-.142-.896-.144-1.329-.007-.432.138-.81.408-1.08.773-.164.222-.477.27-.7.105-.221-.164-.268-.477-.104-.7.395-.533.948-.93 1.581-1.13z" fill="currentColor"/></svg>