podman: update to 6.0.0

Podman 6.0.0 renamed its Go module path to go.podman.io/podman/v6
(source is still hosted at github.com/containers/podman, now under
the podman-container-tools org). Internal imports use the new path,
so go.package is set explicitly to match it; otherwise the GOPATH-mode
build cannot resolve podman's own packages. Verified podman-remote and
podman-mac-helper build cleanly with the new go.package.

Signed-off-by: Paul Guyot <pguyot@kallisys.net>

sysutils/podman/Portfile

@@ -6,7 +6,7 @@ PortGroup           golang 1.0
 # After the upgrade, it is highly recommended to test the `podman machine`.
 # This port has problems with this command from time to time.
 # See https://gist.github.com/judaew/85c6e8a62bf0e7f5be5188e020492e21
-go.setup            github.com/containers/podman 5.8.3 v
+go.setup            github.com/containers/podman 6.0.0 v
 revision            0
 epoch               0
 
@@ -21,10 +21,15 @@ long_description    \
     inside of a VM on the host, or available via the network. You need to \
     install the remote client and then setup ssh connection information.
 
+# Podman 6.0.0 moved its Go module path to go.podman.io/podman/v6 (source
+# still hosted at github.com/containers/podman); internal imports use the
+# new path, so go.package must match it for GOPATH-mode builds to resolve.
+go.package          go.podman.io/podman/v6
+
 checksums           ${distname}${extract.suffix} \
-                    rmd160  669580350879182d7b64a2f51172d27bb032fa7f \
-                    sha256  c54a2ec4b4fb5577288992aaa78684397ec3552fb2d1234d910ec50097d05c0f \
-                    size    20826467
+                    rmd160  4226c51609a4e6822c0c6d451447df8cf73ce109 \
+                    sha256  f35ac7c40f0fd01bfedfe627c23ff7a577b071d50f2b0726e4734d51810f5a7d \
+                    size    20510790
 
 set py_ver          3.14
 set py_ver_nodot    [string map {. {}} ${py_ver}]