Forward the internal handle name wrapped in rich.progress._Reader

[althonos]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

Hi all!

This is just a quick follow-up patch for file/progress so that the reader takes the name attribute from the internal handle. Currently, the _Reader has a name attribute (inherited from RawIOBase) but it's always None.

[willmcgugan]

Thanks!