fix: update "Getting Started" link in _index.html

Author: Varlorg

hugo/content/_index.html

@@ -21,7 +21,7 @@ <h2 class="text-sprottyTeal text-center font-medium text-4xl tracking-wide pb-10
             Fully customizable · Server and client-side diagramming · Easy integration · Powerful timesaver
         </p>
         <div class="flex flex-row gap-10 justify-center items-center pb-10">
-            <a href="./docs/getting-started" class="bg-sprottyMidBlue bg-opacity-50 rounded-xl px-8 py-3 text-sprottyDarkBlue shadow-md">Get started</a>
+            <a href="./docs/learn/getting-started" class="bg-sprottyMidBlue bg-opacity-50 rounded-xl px-8 py-3 text-sprottyDarkBlue shadow-md">Get started</a>
             <a href="#what-is-sprotty" class="text-sprottyDarkBlue">
             <div class="flex flex-row gap-2">
                     <p>Learn more</p>