[MsTeams] Integration is not decoding HTML symbols in Issue titles

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce A user has reported that alerts sent via the MS teams integration is not decoding the html to the proper symbol. In the example shared with me, the alert leads to an issue with a `<` in the title. In the actual alert, we are showing `&lt;` instead of `<`. I attached some screenshots shared with me by the user in this [Linked Jira Ticket](https://getsentry.atlassian.net/browse/FEEDBACK-2208). The screenshots show the same Sentry issue and two alerts. One from the slack integration with shows the `<` correctly, and one from the Ms Teams integration which shows `&lt;` instead ### Expected Result Should be displaying the symbols to match the our email and slack alerts ### Actual Result symbol does not show ### Product Area Settings - Integrations ### Link _No response_ ### DSN _No response_ ### Version _No response_ ┆Issue is synchronized with this [Jira Improvement](https://getsentry.atlassian.net/browse/FEEDBACK-2208) by [Unito](https://www.unito.io)