Update ISSUE_TEMPLATE.md

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### DESCRIPTION

A short description of the issue. 

Example: Conversations aren't marked as read when they are opened from a notification.

### STEPS

1. Steps

2. to 

3. reproduce

4. the 

5. issue.

### EXPECTED

Describe the expected behaviour.

### OBSERVATIONS

Describe what happens instead of the expected behaviour.

If you are going to create an issue, please provide:

- A brief description of your issue

- Steps to reproduce the issue

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