Update to work on 1.16 (#19798)

as per https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/

```
DaemonSet, Deployment, StatefulSet, and ReplicaSet (in the extensions/v1beta1 and apps/v1beta2 API groups)
Migrate to use the apps/v1 API, available since v1.9. Existing persisted data can be retrieved/updated via the apps/v1 API.
```

Signed-off-by: Russell Sim <russell.sim@gmail.com>

incubator/sentry-kubernetes/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: A Helm chart for sentry-kubernetes (https://github.com/getsentry/sentry-kubernetes)
 name: sentry-kubernetes
-version: 0.2.2
+version: 0.2.3
 appVersion: latest
 icon: https://sentry-brand.storage.googleapis.com/sentry-glyph-white.png
 home: https://github.com/getsentry/sentry-kubernetes

incubator/sentry-kubernetes/templates/deployment.yaml

@@ -1,4 +1,4 @@
-apiVersion: apps/v1beta2
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   labels: {{ include "sentry-kubernetes.labels" . | indent 4 }}