Fix links

src/pages/upgrade/index.md

@@ -10,5 +10,5 @@ Upgrading between versions of Holochain can be a bit tricky! While Holochain is
 between minor versions. To make upgrading your hApp easier, we create guides to help you move from one Holochain version 
 to the next.
 
-- [Holochain Upgrade 0.1 → 0.2](/get-started/upgrade-holochain-0.2/)
-- [Holochain Upgrade 0.2 → 0.3](/get-started/upgrade-holochain-0.3/)
+- [Holochain Upgrade 0.1 → 0.2](/upgrade/upgrade-holochain-0.2/)
+- [Holochain Upgrade 0.2 → 0.3](/upgrade/upgrade-holochain-0.3/)

src/pages/upgrade/upgrade-holochain-0.3.md

@@ -155,7 +155,7 @@ You can always check what versions of `@holochain/hc-spin` are available on the
 
 !!!note
 If you happen to be running on a recent Linux version (e.g. Ubuntu 24.04+), you might encounter an error starting your hApp with `hc-spin`.
-There is a guide here you should check out [the advanced installation guide](../install-advanced#fixing-the-suid-sandbox-error-in-ubuntu-24-04).
+There is a guide here you should check out [the advanced installation guide](/get-started/install-advanced#fixing-the-suid-sandbox-error-in-ubuntu-24-04).
 !!!
 
 #### Update `@holochain/tryorama`