Update org.jetbrains.kotlin:kotlin-bom to version 2.1.20 (#297)

Author: asf-rm

pom.xml

@@ -98,7 +98,7 @@
     <guava.version>33.4.5-jre</guava.version>
     <httpclient.version>4.5.14</httpclient.version>
     <jackson.version>2.18.3</jackson.version>
-    <kotlin.version>2.1.10</kotlin.version>
+    <kotlin.version>2.1.20</kotlin.version>
     <snakeyaml.version>2.4</snakeyaml.version>
     <slf4j.version>2.0.17</slf4j.version>
   </properties>