feat: bump appversion from 25.8.0 to 25.9.0 (#1927)

Author: patsevanton

charts/sentry/Chart.yaml

@@ -4,7 +4,7 @@ description: A Helm chart for Kubernetes
 type: application
 version: 27.5.0
 # renovate image=ghcr.io/getsentry/sentry
-appVersion: 25.8.0
+appVersion: 25.9.0
 dependencies:
   - name: memcached
     repository: oci://registry-1.docker.io/bitnamicharts