Add auth/jwt to the list of supported AuthAltTypes.

doc/man/man5/slurm.conf.5

@@ -321,8 +321,8 @@ value for this option is "YES" for Cray systems and "NO" for other system types.
 
 .TP
 \fBAuthAltTypes\fR
-Command separated list of alternative authentication plugins that the slurmctld
-will permit for communication.
+Comma separated list of alternative authentication plugins that the slurmctld
+will permit for communication. Acceptable values at present include "auth/jwt".
 
 .TP
 \fBAuthInfo\fR