Update app/views/how-tos/index.html

Co-authored-by: Frankie Roberto <[email protected]>

app/views/how-tos/index.html

@@ -23,7 +23,7 @@ <h1>How to guides</h1>
       <h2>Get started</h2>
       <ul class="govuk-list govuk-list--bullet">
         <li>
-          <a href="./how-tos/make-first-prototype/start">Build a basic prototype</a>
+          <a href="/how-tos/make-first-prototype/start">Build a basic prototype</a>
           <ol class="nhsuk-list nhsuk-list--number">
             <li>
               <a href="/how-tos/make-first-prototype/open-prototype-in-editor">Open your prototype in your editor</a>