bump helm api to v2 (#15800)

# Checklist for submitter
- [x] Manual QA for all new/changed functionality
closes #15626

charts/fleet/Chart.yaml

@@ -1,4 +1,4 @@
-apiVersion: v1
+apiVersion: v2
 description: A Helm chart for Fleet
 name: fleet
 keywords:
@@ -10,11 +10,11 @@ sources:
   - https://github.com/fleetdm/fleet.git
 appVersion: v4.43.1
 dependencies:
-- name: mysql
-  condition: mysql.enabled
-  version: 9.12.5
-  repository: https://charts.bitnami.com/bitnami
-- name: redis
-  condition: redis.enabled
-  version: 18.1.6
-  repository: https://charts.bitnami.com/bitnami
+  - name: mysql
+    condition: mysql.enabled
+    version: 9.12.5
+    repository: https://charts.bitnami.com/bitnami
+  - name: redis
+    condition: redis.enabled
+    version: 18.1.6
+    repository: https://charts.bitnami.com/bitnami