Update introduction.mdx

Author: jbrooksuk

v3.x/introduction.mdx

@@ -8,7 +8,7 @@ description: 'Cachet is a beautiful and powerful open source status page system.
 </Tip>
 
 <CardGroup>
-    <Card title="Cachet API" href="/v3.x/api-reference" icon="square-terminal">
+    <Card title="Cachet API" href="/api-reference" icon="square-terminal">
         Get started with the Cachet API. Automate every aspect of your status page.
     </Card>
     <Card title="Sponsor Cachet" href="https://github.com/sponsors/cachethq" icon="box-heart">