Update CHANGELOG and appVersion

CHANGELOG.md

 # Changelog
 
-## Unreleased
+## [0.15.10] - 2023-02-08
 
-* Adapt test to changed dashboard button label.
+* Adapt test to changed Stackspin dashboard button label.
 
 ## [0.15.9] - 2023-01-24
 

Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 description: |
   A helm chart for installing NextCloud and setting up ONLYOFFICE integration
 name: nextcloud-onlyoffice
-appVersion: NC-24.0.5-OO-7.2.0.204
+appVersion: NC-25.0.3-OO-7.2.2.56
 version: 0.15.10
 icon: https://cdn.rawgit.com/docker-library/docs/defa5ffc7123177acd60ddef6e16bddf694cc35f/nextcloud/logo.svg
 dependencies:

README.md

@@ -224,9 +224,10 @@ or just run the tests from the console:
 
 To publish a new version of the helm chart:
 1. increase the chart version in `Chart.yaml`;
-2. update `CHANGELOG.md` and check that it includes relevant changes, including
+2. update the appVersion (including both nextcloud and onlyoffice) in Chart.yaml;
+3. update `CHANGELOG.md` and check that it includes relevant changes, including
    ones added by renovatebot;
-3. commit and push these changes to `main`;
-4. create a new git tag for the new release and push it to gitlab as well.
+4. commit and push these changes to `main`;
+5. create a new git tag for the new release and push it to gitlab as well.
 
 The last step will trigger a CI run that will package and publish the helm chart.