fix: broken urls (#176)

## Summary by Sourcery

Bug Fixes:
- Fix broken URLs in the documentation to ensure users can navigate to
the correct resources.

Author: insider89

content/docs/index.mdx

@@ -21,12 +21,12 @@ SettleMint makes it easy for any developer to build, deploy and integrate blockc
   <Card
     title="Create an Application"
     description="Create Your First Application using SettleMint on a Managed Cloud"
-    href="/using-platform/create-an-application"
+    href="/building-with-settlemint/create-an-application"
   />
   <Card
     title="Install On-Premise"
     description="Learn about the supported blockchains that you can use"
-    href="/launch-platform/self-hosted/installing-on-an-existing-cluster/introduction"
+    href="/launching-the-platform/self-hosted/introduction"
   />
 </Cards>
 
@@ -38,7 +38,7 @@ Follow these developer guides to start building on SettleMint
   <Card
     title="Hello World Application"
     description="Create Your First Application using SettleMint on a Managed Cloud"
-    href="/using-platform/create-an-application"
+    href="/building-with-settlemint/create-an-application"
   />
   <Card
     title="Connect Frontend - NextJS"