docs: --cert-dir: point to containers-certs.d(5)

Point to containers-certs.d(5) for details on the default paths, the
lookup logic and the structure of these directories.  Previously, the
man pages stated that the default path would be in `/etc/containers/...`
which is not entirely and a red herring for users (see #10116).

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/docs/source/markdown/podman-image-sign.1.md b/docs/source/markdown/podman-image-sign.1.md
index b9addc062..616aab8ff 100644
--- a/docs/source/markdown/podman-image-sign.1.md
+++ b/docs/source/markdown/podman-image-sign.1.md
@@ -26,7 +26,7 @@ Sign all the manifests of the multi-architecture image (default false).
 #### **--cert-dir**=*path*
 
 Use certificates at *path* (\*.crt, \*.cert, \*.key) to connect to the registry.
-Default certificates directory is _/etc/containers/certs.d_. (This option is not available with the remote Podman client)
+Please refer to containers-certs.d(5) for details. (This option is not available with the remote Podman client)
 
 #### **--directory**, **-d**=*dir*
 
@@ -61,7 +61,7 @@ the signature will be written into sub-directories of
 the signature will be 'read' from that same location on a pull-related function.
 
 ## SEE ALSO
-containers-registries.d(5)
+containers-certs.d(5), containers-registries.d(5)
 
 ## HISTORY
 November 2018, Originally compiled by Qi Wang (qiwan at redhat dot com)