Updated readme [skip ci]

Author: ankane

README.md

@@ -376,7 +376,7 @@ alias pgsync="docker run -ti --rm -v .:/conf -w /conf ankane/pgsync"
 
 This will give you the `pgsync` command.
 
-For databases on the host machine, use `host.docker.internal` as the hostname (on Linux, this requires Docker 20.04+ and `--add-host=host.docker.internal:host-gateway`).
+For databases on the host machine, use `host.docker.internal` as the hostname (on Linux, this requires `--add-host=host.docker.internal:host-gateway`).
 
 ## Dependencies