Posts & Page: Fix everyone icon tint

[momo-ozawa]

Description

Fixes an issue where the everyone icon was the wrong color in dark mode

Before	After (dark mode)	After (light mode)

How to test

• Turn on dark mode
• Switch to a site that has multiple authors
• Go to posts and pages
• Verify the everyone icon is white

Regression Notes

1. Potential unintended areas of impact
   Posts & Pages light mode

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Tested manually

3. What automated tests I added (or what prevented me from doing so)
   See screenshot above

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr22172-281628f
	Version	23.8
	Bundle ID	org.wordpress.alpha
	Commit	281628f
	App Center Build	WPiOS - One-Offs #8072

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[dvdchr]

Works as advertised! LGTM

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr22172-281628f
	Version	23.8
	Bundle ID	com.jetpack.alpha
	Commit	281628f
	App Center Build	jetpack-installable-builds #7092

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

	1 Warning
⚠️	This PR is assigned to the milestone 23.9. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

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