fix: add id and margin style to "Book A Study Room" h2 to fix height issue

Co-authored-by: aider (o3) <aider@aider.chat>

groups/home/bootstrap3/Vue3-v.6.html

@@ -23,6 +23,11 @@
       display: block;
       width: 100%;
     }
+
+    /* Remove default heading margin for uniform button height */
+    #bookastudyroom-heading {
+      margin: 0px;
+    }
   </style>
   <!-- Google Tag Manager (noscript) -->
   <noscript>
@@ -121,7 +126,7 @@
               aria-label="Book A Study Room"
             >
               <div class="nav-divs-by-jumbotron" id="bookastudyroom">
-                <h2>Book A Study Room</h2>
+                <h2 id="bookastudyroom-heading">Book A Study Room</h2>
               </div>
             </button>
             <a