fix: activate margins for header

Author: ThatNerdSquared

src/pages/index.astro

@@ -114,6 +114,7 @@ import { Content as AboutCompetitionContent } from '../content/about-the-competi
     display: grid;
     background-color: var(--color-primary-green);
     border-bottom: var(--border-width) solid var(--border-color);
+    justify-content: center;
 
     h2 {
       font-weight: 500;