Update dependency com.fasterxml.jackson.dataformat:jackson-dataformat-xml to v2.21.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 assertj = "3.27.6"
 equalsVerifier = "4.3"
-jackson = "2.20.1"
+jackson = "2.21.0"
 java-parser = "3.28.0"
 jcommander = "1.82"
 jetbrains-annotations = "26.0.2-1"