tigervnc: security update to 1.16.2

### Affected package (and version) tigervnc (1.16.2+xserver21.1.21) ### CVE ID(s) CVE-2026-34352 ### Severity High ### Other security advisory ID(s） https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393 https://www.openwall.com/lists/oss-security/2026/03/26/7 ### Description/References see above ### Patch(es)/Solution(s) update to 1.16.2