Update doc references (#237)

Signed-off-by: Victor Morales <[email protected]>

e2e/provision/README.md

@@ -1,6 +1,8 @@
 # Quick Start for GCE and VMs running in other environments
 
 Moved to the docs repository:
+
 * [Install
-  Guide](https://github.com/nephio-project/docs/blob/main/install-guide/README.md)
-* [Exercises](https://github.com/nephio-project/docs/blob/main/user-guide/exercises.md)
+  Guide](https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/install-guides/_index.md)
+* [Free5GC exercise](https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/user-guides/exercise-1-free5gc.md)
+* [OAI exercise](https://github.com/nephio-project/docs/blob/main/content/en/docs/guides/user-guides/exercise-2-oai.md)