Describe the bug

Many services respond with header['content-encoding'] in many forms: 'Gzip', 'GZIP', 'GZip'. My example is connected with downloading from storage.googleapis.com. Response header content-encoding has value 'GZIP' and it is a reason why axios don't decompress content. In my opinion header value should be case-insensitive.

To Reproduce

Every request with zipped response with header['content-encoding'] written in non-lowercase letters.

Code snippet

No response

Expected behavior

No response

Axios Version

1.5.0

Adapter Version

http

Browser

chrome

Browser Version

No response

Node.js Version

18

OS

mac os

Additional Library Versions

No response

Additional context/Screenshots

No response