textproc/libxml2: update to 2.10.14 security release (+)

• [CVE-2023-29469] Hashing of empty dict strings isn't deterministic
• [CVE-2023-28484] Fix null deref in xmlSchemaFixupComplexType
• schemas: Fix null-pointer-deref in xmlSchemaCheckCOSSTDerivedOK

• SAX2: Ignore namespaces in HTML documents
• io: Fix "buffer full" error with certain buffer sizes

PR: 270906
Security: 0bd7f07b-dc22-11ed-bf28-589cfc0f81b0

Sponsored by: Serenity Cybersecurity, LLC

(cherry picked from commit acd6567eeccaba062051ae4571c3d20c355383ac)