Convert SVGs in navbar and subnav to pixels (#31767)

site/layouts/partials/docs-navbar.html

 <header class="navbar navbar-expand-md navbar-dark bd-navbar">
   <nav class="container-xxl flex-wrap flex-md-nowrap" aria-label="Main navigation">
     <a class="navbar-brand p-0 mr-2" href="/" aria-label="Bootstrap">
-      {{ partial "icons/bootstrap-white-fill.svg" (dict "class" "d-block my-1" "width" "2.5rem" "height" "2rem") }}
+      {{ partial "icons/bootstrap-white-fill.svg" (dict "class" "d-block my-1" "width" "40px" "height" "32px") }}
     </a>
 
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#bdNavbar" aria-controls="bdNavbar" aria-expanded="false" aria-label="Toggle navigation">

site/layouts/partials/docs-subnav.html

@@ -7,8 +7,8 @@
     {{ partial "docs-versions" . }}
 
     <button class="btn bd-sidebar-toggle d-md-none py-0 px-1 ml-3 order-3 collapsed" type="button" data-toggle="collapse" data-target="#bd-docs-nav" aria-controls="bd-docs-nav" aria-expanded="false" aria-label="Toggle docs navigation">
-      {{ partial "icons/expand.svg" (dict "class" "bi bi-expand" "width" "1.5rem" "height" "1.5rem") }}
-      {{ partial "icons/collapse.svg" (dict "class" "bi bi-collapse" "width" "1.5rem" "height" "1.5rem") }}
+      {{ partial "icons/expand.svg" (dict "class" "bi bi-expand" "width" "24px" "height" "24px") }}
+      {{ partial "icons/collapse.svg" (dict "class" "bi bi-collapse" "width" "24px" "height" "24px") }}
     </button>
   </div>
 </nav>