feat!: default Octicons to whitesmoke fill color

[DenverCoder1]

Description

For consistency with Simple Icons on shields.io, this makes Octicons have whitesmoke as the default fill color unless overridden by the logoColor parameter.

Logos that were previously black by default will now be whitesmoke color.

Type of change

• Bug fix (added a non-breaking change which fixes an issue)
• New feature (added a non-breaking change which adds functionality)
• Updated documentation (updated the readme, templates, or other repo files)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

• Tested endpoints locally

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Screenshots