chore: Bump jackson to 2.18.11 for CVE-2026-89425 (#435)

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: tim-mwangi

build.gradle.kts

@@ -65,7 +65,7 @@ subprojects {
         "opentelemetry_gradle_plugin" to "1.33.0-alpha",
         "byte_buddy" to "1.12.10",
         "slf4j" to "2.0.7",
-        "jackson" to "2.18.10"
+        "jackson" to "2.18.11"
     ))
   }