upstream: ssh_config.5: say "post-quantum" instead of "post quantum

safe", and rephrase the sentence to make it easier to read.

Input djm@, input and OK deraadt@, OK dtucker@

OpenBSD-Commit-ID: c3ee4d1cafdcfc20cc0d2f086021efce4b19c075

ssh_config.5

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh_config.5,v 1.418 2025/08/11 10:55:38 djm Exp $
-.Dd $Mdocdate: August 11 2025 $
+.\" $OpenBSD: ssh_config.5,v 1.419 2025/08/18 18:39:33 caspar Exp $
+.Dd $Mdocdate: August 18 2025 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -2234,7 +2234,7 @@ controls whether the user is warned when the cryptographic algorithms
 negotiated for the connection are weak or otherwise recommended against.
 Warnings may be disabled by turning off a specific warning or by disabling
 all warnings.
-Warnings that the connection is using a non-post quantum safe key exchange
+Warnings about connections that don't use a post-quantum key exchange
 may be disabled using the
 .Cm no-pq-kex
 flag.