Add example of --template usage
Add example of --template usage

Current documentation list all available template vars, but does not provide an example of a template string that demonstrates template substitution. I had to look it up in the unit test.

Signed-off-by: Iaroslav Sheptykin <548a603fadd4c9ef45676aa93dd92750a1962b60@neusta.de>

bacongobbler/helm,helm/helm,helm/helm,bacongobbler/helm