fix broken links

Author: aimen-djari

src/guides/build-iapp/advanced/build-your-first-sgx-iapp.md

@@ -13,7 +13,7 @@ app with the Scone TEE framework.
 ::: warning
 
 Before going any further, make sure you managed to
-[Build your first app](./build-your-first-iapp).
+[Build and Test your iApp](../build-&-test).
 
 :::
 
@@ -45,7 +45,7 @@ Before going further, your `<docker-hub-user>/hello-world:1.0.0` image built
 previously is required.
 
 If you missed that part, please go back to
-[Build your first app](./build-your-first-iapp).
+[Build and Test your iApp](../build-&-test).
 
 For this tutorial, you can reuse the same directory tree or create a new one.
 

src/guides/build-iapp/advanced/quick-start.md

@@ -136,8 +136,8 @@ Given an input string, the app generates an ASCII art greeting.
 
 You can deploy this app on iExec, it will run out of the box. When you are
 confident with iExec concept, you can read
-[Your first app](./build-your-first-iapp.md) and learn how to setup your own app
-on iExec.
+[Build and Test an iApp](../build-&-test) and learn how to setup your own app on
+iExec.
 
 You will now deploy your app on iExec, this will be your first transaction on
 the blockchain: