Update dependency com.github.javaparser:javaparser-core to v3.26.4

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 assertj = "3.27.3"
 equalsVerifier = "3.19.2"
 jackson = "2.18.3"
-java-parser = "3.26.3"
+java-parser = "3.26.4"
 jcommander = "1.82"
 jetbrains-annotations = "26.0.2"
 junit = "5.12.1"