docs: fix link to http proxy document

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
(cherry picked from commit 78a8fba)
Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

docs/reference/commandline/docker.md

@@ -321,7 +321,7 @@ be set for each environment:
 
 These settings are used to configure proxy settings for containers only, and not
 used as proxy settings for the `docker` CLI or the `dockerd` daemon. Refer to the
-[environment variables](#environment-variables) and [HTTP/HTTPS proxy](https://docs.docker.com/config/daemon/systemd/#httphttps-proxy)
+[environment variables](#environment-variables) and [HTTP/HTTPS proxy](https://docs.docker.com/config/daemon/proxy/#httphttps-proxy)
 sections for configuring proxy settings for the cli and daemon.
 
 > **Warning**