Fix link in Contributing.adoc (#7261)

Author: SeungheonOh

CONTRIBUTING.adoc

@@ -80,7 +80,7 @@ If you use Nix, these tools are provided for you via `nix develop`, and you do *
 [WARNING]
 ====
 * We rely on forked or new versions of some system libraries.
-** You can read the https://developers.cardano.org/docs/get-started/cardano-node/installing-cardano-node/[Cardano node documentation] to find out how to install these.
+** You can read the https://developers.cardano.org/docs/operate-a-stake-pool/node-operations/installing-cardano-node/[Cardano node documentation] to find out how to install these.
 * You may get different versions of packages.
 ** This *shouldn't* happen, but we can't guarantee it.
 * We are not currently enabling the Nix integration for these tools, so