BUG: Patch for skipping seek() when loading Excel files from url
- [x] closes #20434
- [x] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

This is my first PR and I tried to follow the guideline. Sorry, if I overlooked something.
I don't have to add anything in whatsnew, because the bug isn't present in the current stable version 0.22, correct?