Update Header.css

Signed-off-by: Sidharth Sharma <87175803+ShishuSidharth@users.noreply.github.com>

Author: ShishuSidharth

src/Header.css

@@ -6,6 +6,7 @@ nav {
   align-items: center;
   width: 100%;
   background-color: slategrey;
+  margin-bottom: 30px;
 }
 .logo {
   flex: 1;