Vitest 4.0.3 release notes

Preserve reporter options from config when CLI reporters override them - by @Copilot and sheremet-va in https://github.com/vitest-dev/vitest/issues/8794 (15552)
browser: More stable in-source testing validation - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8793 (62297)
happy-dom: Support fetch globals - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8791 (0fb74)
init: Use correct jsx/tsx extension - by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8792 (abc04)