Refactor changelog property usage to simplify version mapping logic.

Author: hsz

build.gradle.kts

@@ -37,7 +37,7 @@ intellijPlatform {
 
         val changelog = project.changelog // local variable for configuration cache compatibility
         // Get the latest available change notes from the changelog file
-        changeNotes = providers.gradleProperty("pluginVersion").map { pluginVersion ->
+        changeNotes = version.map { pluginVersion ->
             with(changelog) {
                 renderItem(
                     (getOrNull(pluginVersion) ?: getUnreleased())