Use apiVersion v1 for Ingress in 1.19+
Currently, a warning is shown in newer versions of kubernetes:
```
W1120 10:04:16.194312 8003 warnings.go:67] networking.k8s.io/v1beta1 Ingress is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
```
Co-authored-by: Joel Gallant <joel@joelgallant.me>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/63
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: Andrew Thornton <art27@cantab.net>
Co-Authored-By: joelgallant <joelgallant@noreply.gitea.io>
Co-Committed-By: joelgallant <joelgallant@noreply.gitea.io>
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