add changelog and chart version update

CHANGELOG.md

+## [0.8.0] - 2022-05-04
+
+* Made sure the chart can be installed twice into the same namespace
+  * **BREAKING**: You need to now specify the ONLYOFFICE database password under 
+    `global.onlyofficeDb.password`. If you have overriden other values from
+    `onlyoffice.database`, they should also move to `global.onlyofficeDb`.
+
 ## [0.7.39] - 2022-04-29
 
 * Rename configMap to prevent helmRelease to fail when nextcloud.configs

Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 description: |
   A helm chart for installing NextCloud and setting up ONLYOFFICE integration
 name: nextcloud-onlyoffice
-version: 0.7.40
+version: 0.8.0
 appVersion: NC-23.0.3-OO-7.0.1.37
 icon: https://cdn.rawgit.com/docker-library/docs/defa5ffc7123177acd60ddef6e16bddf694cc35f/nextcloud/logo.svg
 dependencies: