build: update release tags

This updates the list of tags used for `release` builds in the release
documentation. `peersrpc`, `kvdb_postgres`, and `kvdb_etcd` are now
automatically included in `make release` or `make release-install`
builds.

docs/INSTALL.md

@@ -248,6 +248,7 @@ will have the following tags:
 - [walletrpc](/lnrpc/walletrpc/walletkit.proto)
 - [chainrpc](/lnrpc/chainrpc/chainnotifier.proto)
 - [invoicesrpc](/lnrpc/invoicesrpc/invoices.proto)
+- [neutrinorpc](/lnrpc/neutrinorpc/neutrino.proto)
 - [routerrpc](/lnrpc/routerrpc/router.proto)
 - [watchtowerrpc](/lnrpc/watchtowerrpc/watchtower.proto)
 - [monitoring](/monitoring) (for Prometheus integration)