refactor(style): Remove repeated semicolon

[Pytal]

Summary

• refactor(style): Remove repeated semicolon

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

The value is valid, line-height can just be a numeric factor.
This is essential for calculations of different elements with different font sizes, so this is just the relative line height.

See also https://docs.nextcloud.com/server/latest/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_30.html#line-height

---

This value default-line-height can be used on any element regardless if the element uses font-size: var(--default-font-size); or font-size: var(--font-size-small).
Instead if you need the line height of an element you do not need any variable, but simply can use 1lh this is the CSS unit for one line height of that element.

[susnux]

So instead you need to multiply the line height with the font size, or much easier:

Suggested change

	--footer-height: calc(var(--default-line-height) + 2 * var(--default-grid-baseline));
	--footer-height: calc(1lh + 2 * var(--default-grid-baseline));

[susnux]

Suggested change

	--footer-height: calc(2 * var(--default-line-height) + 3 * var(--default-grid-baseline));
	--footer-height: calc(2lh + 3 * var(--default-grid-baseline));