CSS tweak to paragraphs

Author: rcastley

layouts/partials/custom-header.html

@@ -21,6 +21,9 @@
         --MAIN-WIDTH-MAX: 130rem;
         --MENU-WIDTH-L: 23rem;
     }
+    p {
+        margin: 0.75rem 0;
+    }
     .highlight {
         max-height: 500px;
         overflow-y: auto;