fix(docs): update link in index.md to correct installation path

Author: jumski

pkgs/website/src/content/docs/index.mdx

@@ -23,7 +23,7 @@ hero:
       icon: rocket
       variant: minimal
 next:
-  link: /pgflow/getting-started/install-pgflow/
+  link: /getting-started/install-pgflow/
   label: Install pgflow
 ---