Update use of wwlog.Info to specify a format string

Since wwlog.Info() expect a format string, accidental inclusion of a
format string in the payload causes an error.

See also #1382, #1363

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/node/list/main.go

@@ -45,7 +45,7 @@ func CobraRunE(vars *variables) func(cmd *cobra.Command, args []string) (err err
 					ph.Append(strings.Split(val, ":=:"))
 				}
 				ph.Render()
-				wwlog.Info(ph.String())
+				wwlog.Info("%s", ph.String())
 			}
 		}
 		return