chore(deps): update dependency ubuntu to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ubuntu	github-runner	major	24.04 → 26.04

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[codspeed]

Merging this PR will not alter performance

✅ 7 untouched benchmarks

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_{Comparing renovate/ubuntu-26.x (31cab4d) with main (93e211f)}