Helm default value for image tag

[naeriaf]

The default image tag in the helm chart for the docker image tag seems to be broken, I would suggest changing it from 2c3d2b4 to 450a853.

The error encountered when trying to run with the old image tag is this one: #85

[bilalcaliskan]

@naeriaf if you use conventional commit messages patterns in your PR's, it will automatically close linked issue. for example:

fixes #100: draino helm image tag updated