Update chart dependencies

Johannes Bornholdrequested to merge
jbornhold/helm-chart-stack:adjustments into master

I've tried to use the chart and was not able to install it due to missing dependencies.

The proposed changes are the latest versions which I found via https://artifacthub.io.

With the changes I was able to deploy the cart, did not yet test out if the application is fully functional though. Still thought I could be useful to send the changes early if anyone else would be trying to use the chart.

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