issue-547 http header quality factor number

[thefunkinator]

Proposed changes

Change in Werkzeug 2.3.5 as issued here caused the fail in build. As per HTTP RFC the quality-factor for HTTP Accept Header has to be like X.X. So changing them all to such format, all Unit tests and Tox test passes.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the guidelines for contributing
• All unit tests pass on my local version with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Fixes #547

[peter-doggart]

LGTM. 👍