docker: correct substitution path with buildx enabled

Starting with Docker 20.10, the client repo moved and the path changed.

pkgs/applications/virtualization/docker/default.nix

@@ -169,7 +169,7 @@ rec {
       substituteInPlace ./scripts/docs/generate-man.sh --replace "-v md2man" "-v go-md2man"
       substituteInPlace ./man/md2man-all.sh            --replace md2man go-md2man
     '' + optionalString buildxSupport ''
-      substituteInPlace ./components/cli/cli-plugins/manager/manager_unix.go --replace /usr/libexec/docker/cli-plugins \
+      substituteInPlace ./cli-plugins/manager/manager_unix.go --replace /usr/libexec/docker/cli-plugins \
           ${lib.strings.makeSearchPathOutput "bin" "libexec/docker/cli-plugins" [docker-buildx]}
     '';