ENH: Update vendored VNL pin to for/itk-vxl-master-7829892

Author: hjmjohnson

Modules/ThirdParty/VNL/UpdateFromUpstream.sh

@@ -8,7 +8,7 @@ readonly name='VXL'
 readonly ownership='Insight Software Consortium Maintainers <https://discourse.itk.org/>'
 readonly subtree="Modules/ThirdParty/VNL/src/vxl"
 readonly repo="https://github.com/InsightSoftwareConsortium/vxl.git"
-readonly tag="for/itk-vxl-master-272c3f1" # 2026-06-09 (272c3f1: linkage fixes + config-option removals)
+readonly tag="for/itk-vxl-master-7829892" # 2026-06-10 (7829892: deprecation sweep + vnl_error maybe_unused)
 readonly shortlog=false
 readonly exact_tree_match=false
 readonly paths="