Fix 'issue template' link in CONTRIBUTING.md (#13587) [ci skip]

[samrxh]

Fix 'issue template' link to point to the issue templates instead of a blank new issue.

Description

I updated the link and changed the grammar to point to the issue templates.
Here is the issue I created for this.

Types of change

Change to the documentation.

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[ines]

Thank you! 🙏