Update dependency undici to v7.6.0

[gardener-ci-robot]

This PR contains the following updates:

Package	Type	Update	Change
undici (source)	dependencies	minor	7.5.0 -> 7.6.0

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Release Notes

nodejs/undici (undici)

v7.6.0

Compare Source

What's Changed

• Update WPT by @​github-actions in https://github.com/nodejs/undici/pull/4067
• lib: limit string split length by @​gurgunday in https://github.com/nodejs/undici/pull/4098
• docs/PULL_REQUEST_TEMPLATE: deep-link to certificate of origin by @​alxndrsn in https://github.com/nodejs/undici/pull/4102
• cache: fix typo by @​alxndrsn in https://github.com/nodejs/undici/pull/4101
• disable header de-duplication in test servers by @​alxndrsn in https://github.com/nodejs/undici/pull/4110
• CacheRevalidationHandler: add missing header to comment by @​alxndrsn in https://github.com/nodejs/undici/pull/4111
• Fix typo in Agent.md by @​Exifers in https://github.com/nodejs/undici/pull/4115
• build(deps-dev): bump @​matteo.collina/tspl from 0.1.1 to 0.2.0 by @​dependabot in https://github.com/nodejs/undici/pull/4119
• fix 4105 by @​KhafraDev in https://github.com/nodejs/undici/pull/4117
• Update WPT by @​github-actions in https://github.com/nodejs/undici/pull/4100
• cache: ensure vary & revalidation headers are case-insensitive by @​alxndrsn in https://github.com/nodejs/undici/pull/4112

New Contributors

• @​alxndrsn made their first contribution in https://github.com/nodejs/undici/pull/4102
• @​Exifers made their first contribution in https://github.com/nodejs/undici/pull/4115

Full Changelog: nodejs/undici@v7.5.0...v7.6.0

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