Markdown escaping issue

This job step always fails:

```yaml
- name: Send telegram notification
if: ${{always()}}
uses: appleboy/telegram-action@master
with:
to: ${{secrets.TELEGRAM_CHAT}}
token: ${{secrets.TELEGRAM_TOKEN}}
format: markdown
message: |
Test *()
```

Job logs:
```
Run appleboy/telegram-action@master
with:
to: ***
token: ***
format: markdown
message: Test *()

env:
...
/usr/bin/docker run --name dc5057a2652147a674d62abf3a4930e7521c7_f86794 --label 0dc505 --workdir /github/workspace --rm -e ...
2023/10/22 18:39:40 Bad Request: can't parse entities: Can't find end of the entity starting at byte offset 5
```

Should I manually escape chars in `message`?

Start by reproducing the GitHub Actions step shown in the issue with the message `Test *()`, then inspect how appleboy/telegram-action passes the message and format to Telegram. Done means the same Markdown message is delivered without Telegram's entity-parsing error.

Written by the indexing model from the issue text.