Update CI WF

Author: k163377

.github/workflows/main.yml

@@ -27,8 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         java_version: ['8', '11', '17']
-        # Jackson 2.15 drops support for Kotlin 1.4
-        kotlin_version: ['1.5.32', '1.6.21', '1.7.20', '1.8.10', '1.8.20-RC']
+        kotlin_version: ['1.6.21', '1.7.20', '1.8.22', '1.9.0']
         os: ['ubuntu-20.04']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"