docs: add comment for doc column width override in redoc styles

Signed-off-by: Jonathan Norris <jonathan@taplytics.com>

Author: jonathannorris

src/css/custom.css

@@ -288,6 +288,7 @@ article:has(.redoc-container) {
   max-width: none !important;
 }
 
+/* Force doc column to full width when Redoc is present */
 .main-wrapper:has(.redoc-container) [class*="docItemCol"] {
   max-width: none !important;
   flex-basis: 100% !important;