Update dependency @digdir/designsystemet-theme to v0.15.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@digdir/designsystemet-theme (source)	0.15.0 -> 0.15.3

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Release Notes

digdir/designsystemet (@​digdir/designsystemet-theme)

### [`v0.15.3`](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.2...@digdir/designsystemet-theme@0.15.3) [Compare Source](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.2...@digdir/designsystemet-theme@0.15.3) ### [`v0.15.2`](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.1...@digdir/designsystemet-theme@0.15.2) [Compare Source](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.1...@digdir/designsystemet-theme@0.15.2) ### [`v0.15.1`](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.0...7e0cd9954f4aa80edb7e328e002bcfe387ec624b) [Compare Source](https://togithub.com/digdir/designsystemet/compare/@digdir/designsystemet-theme@0.15.0...@digdir/designsystemet-theme@0.15.1)

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Configuration

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