Update navbar logo and hero image

Author: mdo

site/layouts/partials/docs-navbar.html

@@ -1,7 +1,7 @@
 <header class="navbar navbar-expand navbar-dark bd-navbar">
   <nav class="container-xxl flex-wrap flex-md-nowrap" aria-label="Main navigation">
-    <a class="navbar-brand mr-2" href="/" aria-label="Bootstrap">
-      {{ partial "icons/bootstrap-logo-solid.svg" (dict "class" "d-block" "width" "32" "height" "32") }}
+    <a class="navbar-brand p-0 mr-2" href="/" aria-label="Bootstrap">
+      {{ partial "icons/bootstrap-white-fill.svg" (dict "class" "d-block" "height" "32") }}
     </a>
 
     <div class="navbar-nav-scroll order-3 order-md-0 d-flex justify-content-center justify-content-md-start mt-1 mt-md-0">

site/layouts/partials/home/masthead.html

@@ -1,8 +1,8 @@
 <main class="bd-masthead mb-3 mb-md-5" id="content">
   <div class="container px-4 px-md-3">
-    <div class="row">
-      <div class="col-6 mx-auto col-md-4 order-md-2 col-lg-5">
-        {{ partial "icons/bootstrap-stack.svg" (dict "class" "img-fluid mb-3 mb-md-0" "width" "512" "height" "430") }}
+    <div class="row align-items-lg-center">
+      <div class="col-8 mx-auto col-md-4 order-md-2 col-lg-5">
+        {{ partial "homepage-hero.svg" (dict "class" "img-fluid mb-3 mb-md-0" "width" "900" "height" "800") }}
       </div>
       <div class="col-md-8 order-md-1 col-lg-7 text-center text-md-left">
         <h1 class="mb-3">Build fast, responsive sites with Bootstrap</h1>