Update dependency plexsystems/konstraint to v0.43.0 (#438)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

confbatstest/Dockerfile_build

@@ -2,7 +2,7 @@
 FROM registry.access.redhat.com/ubi9/go-toolset@sha256:380d6de9bbc5a42ca13d425be99958fb397317664bb8a00e49d464e62cc8566c AS konstraint
 
 # renovate: datasource=github-releases depName=plexsystems/konstraint
-ARG KONSTRAINT_VERSION=v0.42.0
+ARG KONSTRAINT_VERSION=v0.43.0
 
 # go1.23 not released yet - so need to manually upgrade
 USER root