README has inconsistent greenmail version

[comex]

From README.tpl:

$ docker pull greenmail/standalone:1.6.2
$ docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.5.9

This has version 1.6.2 on the first line and 1.5.9 on the second line. I'm not too familiar with Docker, but this seems unlikely to be intended.

[Jon Gjengset]

Good catch! Fixed, thank you :)