add CHANGELOG entry and bump chart version number

CHANGELOG.md

+## [0.5.0] - 2021-11-02
+
+* Change the sociallogin settings structure so it can be automatically converted
+  to JSON
+
+  If you use sociallogin, you need to change the settings to conform the
+  structure currently under `sociallogin.custom_oidc` in `values.yaml`.
+
+  Example:
+
+  ```yaml
+  sociallogin:
+    custom_oidc:
+      authorizeUrl: "sso.${domain}/oauth2/auth"
+      tokenUrl: "sso.${domain}/oauth2/token"
+      userInfoUrl: "sso.${domain}/userinfo"
+      clientSecret: "${nextcloud_oauth_client_secret}"
+  ```
+
 ## [0.4.0] - 2021-11-02
 
 * Replace pod probes by exec ones to actually check healthcheck status

Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 description: |
   A helm chart for installing NextCloud and setting up ONLYOFFICE integration
 name: nextcloud-onlyoffice
-version: 0.4.0
+version: 0.5.0
 appVersion: NC-20.0.11-OO-6.2.2.21
 dependencies:
   # https://artifacthub.io/packages/helm/nextcloud/nextcloud