fix(deps): update dependency uk.org.webcompere:system-stubs-jupiter to v2.1.6

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
uk.org.webcompere:system-stubs-jupiter	1.2.0 -> 2.1.6
uk.org.webcompere:system-stubs-jupiter	2.1.5 -> 2.1.6

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