Add interval to a couple of examples in docs as it's now a required field

[yiannistri]

• Add interval to a couple of examples in docs as it's now a required field

[stefanprodan]

The e2e tests are failing because Bitnami introduced a chart dependency named common and source controller doesn't support dependencies in Git repos that point to Helm repos. We need to use a repo that we control cc @hiddeco

[hiddeco]

@yiannistri created #165 to solve the test issue. While we wait for the chart release, can you please amend your commit message to include a bit of the information from the PR title? Thanks 🧁

[yiannistri]

Yes sure 👍

[hiddeco]

@yiannistri if you rebase this it should now pass :-)