WIP - Update index.html

Added spacing between cards and opening paragraph

index.html

@@ -30,7 +30,7 @@
       <main>
         <h1>Ok data, let's dance!</h1>
         <p class="fs-5 col-md-8">OceanDataTools provides a suite of open-source tools for collecting and managing data created aboard oceanographic research vessels as well as manned, remotely operated and autonomously operated vehicles.</p>
-        <div class="row g-3 mb-5">
+        <div class="row g-3 my-5">
           <div class="col-md-4 tool-col">
             <div class="card tool-card">
               <div class="card-header">