[21309] Change back Ubuntu versions for CI and RTD#857

Merged

EduPonz merged 1 commit intomasterfrom hotfix/ci

Jul 9, 2024

+4-4

Commits on Jul 9, 2024

Refs #21309: Use Ubuntu 22.04 in CI and 20.04 in RTD until 24.04 build is fixed
EduPonz
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