Tweak onFOSS logo position (bit hacky)

_includes/nav.html

@@ -1,7 +1,7 @@
     <header class="navbar bg-body-tertiary">
       <nav class="container">
         <a href="/" class="navbar-brand fs-4">
-          <img class="d-inline-block align-text-bottom" height="36" src="/assets/img/logo.svg" alt="Site icon">
+          <img class="mt-n3" height="36" src="/assets/img/logo.svg" alt="Site icon">
         </a>
         <div class="d-flex mb-3 mb-md-0 me-md-auto">
           <div class="btn-group">

_sass/base.scss

@@ -1,5 +1,7 @@
 // Custom style matching the brand
 
+$enable-negative-margins: true;
+
 $primary: #43543F;
 //$secondary: red;
 $body-bg: #3F3F3E;