Security update for expat

This update for expat fixes the following issues: Version update to 2.7.1: Bug fixes: 980 989 Restore event pointer behavior from Expat 2.6.4 that the fix to CVE-2024-8176 changed in 2.7.0; affected API functions are: - XMLGetCurrentByteCount - XMLGetCurrentByteIndex - XMLGetCurrentColumnNumber -...