[rpms/inspektor-gadget] rawhide: README: Detail how to build with podman.

[Francis Laniel <laniel_francis@privacyrequired.com>]

            A new commit has been pushed.

            Repo   : rpms/inspektor-gadget
            Branch : rawhide
            Commit : 9dea3b08d620b72aaa7f32cafac3449b155d59ad
            Author : Francis Laniel <laniel_francis@privacyrequired.com>
            Date   : 2026-06-03T10:36:25+03:00
            Stats  : +4/-1 in 1 file(s)
            URL    : https://src.fedoraproject.org/rpms/inspektor-gadget/c/9dea3b08d620b72aaa7f32cafac3449b155d59ad?branch=rawhide

            Log:
            README: Detail how to build with podman.

Signed-off-by: Francis Laniel <laniel_francis@privacyrequired.com>

---
diff --git a/README.md b/README.md
index 9d43dfa..c70b328 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,10 @@ The whole process can be achieved using the corresponding container:
 
 ```bash
 $ docker build --build-arg USER=$USER --build-arg UID=$(id -u) --build-arg GID=$(id -g) -t fedora-ig-bumper -f Dockerfile .
-$ docker run -ti --rm -v $(pwd):/work -v $HOME/.ssh:/$HOME/.ssh -w /work fedora-ig-bumper
+# For rootfull docker use the following:
+$ docker run -ti --rm -v $(pwd):/work -v $HOME/.ssh:$HOME/.ssh -w /work fedora-ig-bumper
+# For rootless podman, use the following:
+$ podman run -ti --rm -v $(pwd):/work -v $HOME/.ssh:$HOME/.ssh -w /work --userns=keep-id fedora-ig-bumper
 ```
 
 From now, all the commands will be run as your user from the `fedora-ig-bumper` container.