docs: replace fuse-overlayfs example with additionalimagestore

The fuse-overlayfs example was misleading as setting fuse-overlayfs
will cause a persistent storage configuration change rather than a
one-time option.

Closes: #26590

Signed-off-by: Giuseppe Scrivano <[email protected]>

Author: giuseppe

docs/source/markdown/podman-run.1.md.in

@@ -776,11 +776,11 @@ $ podman run --uidmap 0:30000:7000 --gidmap 0:30000:7000 fedora echo hello
 
 Podman allows for the configuration of storage by changing the values
 in the _/etc/container/storage.conf_ or by using global options. This
-shows how to set up and use fuse-overlayfs for a one-time run of busybox
+shows how to use an additional image store for a one-time run of busybox
 using global options.
 
 ```
-podman --log-level=debug --storage-driver overlay --storage-opt "overlay.mount_program=/usr/bin/fuse-overlayfs" run busybox /bin/sh
+podman --log-level=debug --storage-opt "additionalimagestore=/tmp/readonly-images" run busybox /bin/sh
 ```
 
 ### Configure timezone in a container