Merge pull request #243 from openapi-processor/dependabot/gradle/checker-4.0.0

Bump checker from 3.54.1 to 4.0.0

Author: hauner

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ build-plugins = "2026.3"
 
 # using the embedded kotlin version of Gradle to avoid mixed versions
 kotlin = "2.3.0"
-checker = "3.54.1"
+checker = "4.0.0"
 checkerp = "0.6.61"
 jacoco = "0.8.11"
 jacocolog = "4.0.1"