update pr template

Update .github/release_template.md
Update .github/config.yml

Co-authored-by: Benedikt Kulmann <benedikt@kulmann.biz>

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

.github/config.yml

@@ -2,7 +2,7 @@
 
 # Comment to be posted to on PRs that don't update documentation
 updateDocsComment: >
-  Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a [changelog](https://github.com/opencloud-eu/opencloud/blob/master/changelog/README.md) item based on your changes.
+  Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a [changelog](https://github.com/opencloud-eu/opencloud/blob/main/changelog/README.md) item based on your changes.
 updateDocsWhiteList:
   - Tests-only
   - tests-only

.github/pull_request_template.md

@@ -48,8 +48,7 @@ Please set the following labels:
 
 ## Checklist:
 <!-- Tick the checkboxes when done. -->
-<!-- Raise documentation ticket in opencloud.github.io/ -->
 - [ ] Code changes
 - [ ] Unit tests added
 - [ ] Acceptance tests added
-- [ ] Documentation ticket raised: <link> 
+- [ ] Documentation added

.github/release_template.md

@@ -1,5 +1,5 @@
 ### Template
-[Release Template](https://github.com/opencloud-eu/opencloud/blob/master/.github/release_template.md)
+[Release Template](https://github.com/opencloud-eu/opencloud/blob/main/.github/release_template.md)
 
 ### Prerequisites