chore: update Gradle to 9.0.0 and refine build-rc workflow #4

Job	Run time
build (ubuntu-22.04, x64, ubuntu-22.04, packageReleaseDeb, ubuntu, Build Deb x86-64)	6m 55s
build (ubuntu-22.04-arm, arm64, ubuntu-22.04-arm, packageReleaseDeb, ubuntu, Build Deb arm64 and ...	5m 40s
build (ubuntu-24.04-arm, arm64, ubuntu-24.04-arm, rocky-linux-8, Build AppImage arm64 and package...	6m 20s
build (ubuntu-latest, x64, ubuntu-latest, rocky-linux-8, Build AppImage x86-64)	6m 56s
build (macos-latest, arm64, macos-15, packageReleaseDmg packageReleasePkg, macos, Build Dmg and P...	5m 43s
build (macos-13, x64, macos-13, packageReleaseDmg packageReleasePkg, macos, Build Dmg and Pkg x86...	8m 48s
build (windows-11-arm, arm64, windows-11-arm, packageReleaseMsi packageReleaseExe, windows, Build...	6m 43s
build (windows-latest, x64, windows-latest, packageReleaseMsi packageReleaseExe, windows, Build M...	8m 21s
release	24s
Build Flatpak (arm64, aarch64, ubuntu-24.04-arm)	10m 11s
Build Flatpak (x64, x86_64, ubuntu-latest)	8m 28s
	1h 14m 29s

Provide feedback