GitHub: fix link in release template

Fixes #8055.
This PR fixes a broken link in the release page template.

.github/workflows/release.yaml

@@ -92,7 +92,7 @@ jobs:
 
             ## Verifying the Release Binaries
 
-            Our release binaries are fully reproducible. Third parties are able to verify that the release binaries were produced properly without having to trust the release manager(s). See our [reproducible builds guide](https://github.com/lightningnetwork/lnd/tree/master/build/release) for how this can be achieved.
+            Our release binaries are fully reproducible. Third parties are able to verify that the release binaries were produced properly without having to trust the release manager(s). See our [reproducible builds guide](https://github.com/lightningnetwork/lnd/blob/master/docs/release.md) for how this can be achieved.
             The release binaries are compiled with `go${{ env.GO_VERSION }}`, which is required by verifiers to arrive at the same ones.
             They include the following build tags: `autopilotrpc`, `signrpc`, `walletrpc`, `chainrpc`, `invoicesrpc`, `neutrinorpc`, `routerrpc`, `watchtowerrpc`, `monitoring`, `peersrpc`, `kvdb_postrgres`, `kvdb_etcd` and `kvdb_sqlite`. Note that these are already included in the release script, so they do not need to be provided.