Pull Request Template

Description

Updated the .env.example file to provide clearer instructions for setting up the Postmark inbound webhook. Many users, including myself, found the initial instructions ambiguous, leading to difficulties during setup. This change aims to simplify the process for future users by providing clearer instructions and examples.

Fixes #8234

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)
• This change requires a documentation update

How Has This Been Tested?

The updated instructions were tested during my personal setup of Chatwoot with Postmark. However, please note that these are documentation changes and do not directly affect the software's functionality.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (This may not be applicable since it's a documentation change)
• New and existing unit tests pass locally with my changes (Again, this is more for code than documentation)
• Any dependent changes have been merged and published in downstream modules (If there are dependent changes, you can check this)