[calibre-web] Updating Calibre-Web Version and add option for ebook conversion binaries

[janpfischer]

Description of the change

This PR bumps the app version. It also introduces to environment variable of the underlying contrainer to quickly activate the ebook conversion.

Benefits

New version and easy configuration.

Possible drawbacks

none

Applicable issues

none

Additional information

none

Checklist

• [X] Title of the PR starts with chart name (e.g. [home-assistant])
• [X] Chart version bumped in Chart.yaml according to semver.
• [X] Chart artifacthub.io/changes changelog annotation has been updated in Chart.yaml. See Artifact Hub documentation for more info.
• [X] Variables have been documented in the values.yaml file.

[truxnell]

Thanks for the PR @b1rdhous3!

Looks like you have some whitespace to chomp, can you have a look?

[janpfischer]

Oh yes, you are right @Truxnell . Will do in near future!