Bump Kover version to 0.8.0-Beta2 (#4093)

Author: shanshin

gradle.properties

@@ -22,7 +22,7 @@ rxjava3_version=3.0.2
 javafx_version=17.0.2
 javafx_plugin_version=0.0.8
 binary_compatibility_validator_version=0.13.2
-kover_version=0.8.0-Beta
+kover_version=0.8.0-Beta2
 blockhound_version=1.0.8.RELEASE
 jna_version=5.9.0