added little more spacing between sections

public/sass/components/_gf-form.scss

@@ -19,7 +19,7 @@ $gf-form-margin: 0.4rem;
 }
 
 .gf-form-group {
-  margin-bottom: $spacer * 1.5;
+  margin-bottom: $spacer * 2.5;
 }
 
 .gf-form-inline {