feat(apps): move koel and zerotier to stable (#2232)

* feat(koel): move to stable

* feat(zerotier): move to stable

* update app req

charts/stable/koel/Chart.yaml

@@ -25,7 +25,7 @@ sources:
 - https://github.com/koel/docker
 - https://hub.docker.com/r/hyzual/koel
 - https://github.com/koel/koel
-version: 0.0.6
+version: 1.0.0
 annotations:
   truecharts.org/catagories: |
     - media

charts/stable/zerotier/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v2
 kubeVersion: ">=1.16.0-0"
 name: zerotier
-version: 0.0.1
+version: 1.0.0
 appVersion: "1.8.4"
 description: ZeroTier is a smart programmable Ethernet switch for planet Earth
 type: application