Fix broken links in triagebot

[marcellino-ornelas]

Type of change (place an x in the [ ] that applies)

• New sample
• New feature
• Bug fix
• Documentation

Summary

Triagebot currently has a bug where some links aren't displaying as links

example:

The issue here is that when we truncate the main slack message, its possible to truncate a link, channel, or user link (Eg <channel,user,link>). This causes a dangling < to be left in the message which effects the next message below.

To fix this bug, well be using a new regex to replace all dangling < after the message has been truncated this way it cant effect the next message.

The channel, link, user will always be broken at the end because of the truncation but thats something we can try to solve another day

Testing

This function lacked testing so I decided to add some unit tests to test old behavior and new behavior im introducing

Requirements (place an x in each [ ] that applies)

• I’ve checked my submission against the Samples Checklist to ensure it complies with all standards
• I have ensured the changes I am contributing align with existing patterns and have tested and linted my code
• I've read and agree to the Code of Conduct