CLSA-2025-1762362132 webkit2gtk3: Fix of 4 CVEs

Update to 2.48.7. The following CVEs were fixed: - CVE-2025-43272: fix processing maliciously crafted web content which may lead to an unexpected process/Safari crash - CVE-2025-43342: fix processing maliciously crafted web content which may lead to an unexpected process crash - CVE-2025-43356:...