Charts and documentation use both `us-east-1` and `us-east1` (missing hyphen before the 1)

Dear maintainers,

there are several places in the documentation and the helm charts, where the region is mentioned. Some of them use the region `us-east-1`, some of them use `us-east1`. The difference is subtle, there is a missing hyphen before the `1` in the latter.

Would be nice to fix all occurrences to use the same value, as this is hard to spot during debugging (`cannot find region us-east1`)...

* https://github.com/cockroachdb/helm-charts/blob/master/cockroachdb/values.yaml#L898
* https://github.com/cockroachdb/helm-charts/blob/master/cockroachdb-parent/values.yaml#L24
* ...

Kind Regards,
Johannes

Start by checking cockroachdb/values.yaml around line 898 and cockroachdb-parent/values.yaml around line 24, then search the repository for both region spellings. Update the inconsistent occurrences to one value across the documentation and Helm charts, and verify that no `us-east1` references remain where `us-east-1` is intended.

Written by the indexing model from the issue text.