fix #55489
- [BUG ] closes #55489
- Added _**"This will necessarily result in ``object`` dtype."**_ to the pandas.io.read_excel() docstring

@ziadk - you do not need to update your PR branch each time the main branch is updated. Doing so kicks off all the tests. Periodically (every few days or so) is okay, and especially when there are merge conflicts. @ziadk - this looked pretty good, likely just needed to fix the line being too long (we don't allow more than 88 characters on a line) and then add the missing space between the period and the next sentence. Are you interested in continuing?