fix redis chart version

charts/outline/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: outline
-version: 0.0.5
+version: 0.0.6
 description: Chart for Outline wiki
 keywords:
   - wiki
@@ -14,5 +14,5 @@ icon: https://avatars.githubusercontent.com/u/1765001?s=48&v=4
 dependencies:
   - name: redis
     repository: https://charts.bitnami.com/bitnami
-    version: 18.x.x
+    version: 18.19.2
 appVersion: v0.75.2