Adjust brand weight to make it more readable

static/assets/css/navbar.css

@@ -20,7 +20,7 @@
 
 .initial-navbar .navbar-brand {
   color: #c0ccda;
-  font-weight: 800;
+  font-weight: 600;
 }
 
 .initial-navbar li a {
@@ -57,7 +57,7 @@
 
 .final-navbar .navbar-brand {
   color: #1c2d41;
-  font-weight: 800;
+  font-weight: 600;
 }
 
 .final-navbar li a {