[css] fix spacing at the top

frontend/src/app/components/about/about.component.scss

@@ -22,6 +22,7 @@
 
   .intro {
     margin: 25px auto 30px;
+    margin-top: 49px;
     width: 250px;
     display: flex;
     flex-direction: column;

frontend/src/styles.scss

@@ -62,10 +62,6 @@ body {
   position: relative;
 }
 
-main {
-  margin-top: 24px;
-}
-
 .full-height {
   @media (max-width: 767.98px) {
     min-height: 100vh;