[paperless] Update Image/App Version to v1.8.0

[simoncaron]

Signed-off-by: Simon Caron simon.caron.8@gmail.com

Description of the change

Updated app version to the latest release.

Benefits

Bugfixes + new features

N/A

Applicable issues

N/A

Additional information

N/A

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.