Reword next release release note a bit

This is unrelated to this PR, but requested in NixOS#11224 (comment)

Co-Authored-By: Robert Hensing <robert@roberthensing.nl>

doc/manual/rl-next/build-hook-default.md

@@ -16,7 +16,7 @@ This has a small adverse affect on remote building --- the `build-remote` execut
 This means that other applications linking `libnixstore` that wish to use remote building must arrange for the `nix` command to be on the PATH (or manually overriding `build-hook`) in order for that to work.
 
 Long term we don't envision this being a downside, because we plan to [get rid of `build-remote` and the build hook setting entirely](https://github.com/NixOS/nix/issues/1221).
-There is simply no need to add a second layer of remote-procedure-calling when we want to connect to a remote builder.
+There should simply be no need to have an extra, intermediate layer of remote-procedure-calling when we want to connect to a remote builder.
 The build hook protocol did in principle support custom ways of remote building, but that can also be accomplished with a custom service for the ssh or daemon/ssh-ng protocols, or with a custom [store type](@docroot@/store/types/index.md) i.e. `Store` subclass. <!-- we normally don't mention classes, but consider that this release note is about a library use case -->
 
-The Perl bindings no longer expose `getBinDir` either, since they libraries those bindings wrap no longer know the location of installed binaries as described above.
+The Perl bindings no longer expose `getBinDir` either, since the underlying C++ libraries those bindings wrap no longer know the location of installed binaries as described above.