[Typo] Inconsistent "dark" naming for Footer components

[hyphenzero]

What component (if applicable)

• URL for category: Marketing / Page Sections / Footers
• Component name: "4-column simple dark" and every "dark" component below it

Describe the bug

The specified components’ names are affixed with "dark" (as in "4-column simple dark")

To Reproduce

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Expected behavior

Component names are affixed with "on dark" (as in "4-column simple on dark"), which is the naming convention that all other "dark" components follow

Screenshots

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Browser/Device (if applicable)

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Additional context

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[reinink]

Hey thanks for point this out, I've corrected this 👍