Fix typo in `.Values.prometheus`

[redzioch]

I found a typo: namespece should be changed to namespace in .Values.prometheus.

Typo was only in values.yaml and therefore in README.md. Both fixed. In Deployment it was correct.

Tasks:

• [x] I've made changes
• [x] I've bumped chart's version in Chart.yaml
• [x] I've added changes to charts CHANGELOG.md
• [x] I've run helm-docs

[MaikuMori]

Thank you! Let's also bump the Gotenberg version since they have released a minor patch.