[css] fix spacing at the top x2

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

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

frontend/src/styles.scss

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