java-1.8.0-openjdk: Fix of 6 CVEs

Upgrade to openjdk-shenandoah-jdk8u-shenandoah-jdk8u502-b07. That fixes following CVEs: - CVE-2026-46968: JSSE, remote high-complexity integrity flaw in TLS certificate handling - CVE-2026-47010: ImageIO, remote high-complexity low-impact integrity flaw in JPEG handling - CVE-2026-47021: 2D,...