chore(deps): update dependency tunit to 1.18.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
TUnit	1.18.9 → 1.18.21

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Release Notes

thomhurst/TUnit (TUnit)

v1.18.21: 1.18.21

What's Changed

Other Changes

• avoid some string alloc by using AppendJoin by @​SimonCropp in #​4971
• respect attribute namespace during migration by @​SimonCropp in #​5066
• fix: parent data source initialization spans under session span by @​thomhurst in #​5071

Dependencies

• chore(deps): update tunit to 1.18.9 by @​thomhurst in #​5060
• chore(deps): update dependency polyfill to 9.14.0 by @​thomhurst in #​5063
• chore(deps): update dependency microsoft.testing.extensions.codecoverage to 18.5.2 by @​thomhurst in #​5065
• chore(deps): update dependency polyfill to 9.14.0 by @​thomhurst in #​5062
• chore(deps): update actions/github-script action to v8 by @​thomhurst in #​5053
• chore(deps): update dependency polyfill to 9.15.0 by @​thomhurst in #​5067
• chore(deps): update dependency polyfill to 9.15.0 by @​thomhurst in #​5068

Full Changelog: thomhurst/TUnit@v1.18.9...v1.18.21

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