String update and file extension name consistency (#436)

* Fixes #434

* Fixes #433

* Prtially fixes #432

* Disable auto labelling of issues

* Use yaml instead of yml as recommended by yaml.org

* shortened the strings

* simplified option description

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +0,0 @@
-contact_links:
-  - name: 💬 Matrix Chat
-    url: https://matrix.to/#/#cinny:matrix.org
-    about: Ask questions and talk to other Cinny users and the maintainers