fix: fix jackson core version

Author: RichardSlater

pom.xml

@@ -45,7 +45,7 @@
     <hamcrest.version>3.0</hamcrest.version>
     <fmt-maven-plugin.version>2.13</fmt-maven-plugin.version>
     <io-projectreactor-netty.version>1.3.0</io-projectreactor-netty.version>
-    <jackson.version>2.20.0</jackson.version>
+    <jackson.version>2.20</jackson.version>
     <jacoco.version>0.8.14</jacoco.version>
     <junit-jupiter.version>6.0.1</junit-jupiter.version>
     <mockito.version>5.20.0</mockito.version>