fix: increase sidebar header top padding to 2rem for full banner visibility

Author: angelovstanton

docs/_sass/custom/custom.scss

@@ -5,7 +5,7 @@
 .side-bar {
   .site-header {
     background-color: transparent;
-    padding: 1.25rem 1rem 0.75rem;
+    padding: 2rem 1rem 0.75rem;
     height: auto;
     min-height: 0;
     border-bottom: none;