[nitter] Fix nitter values indentation

Signed-off-by: David Young davidy@funkypenguin.co.nz

Description of the change

Benefits

Possible drawbacks

Applicable issues

Additional information

Checklist

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

geek-cookbook / charts