Fixing default module name for kotlin-extensions (#1602)

Author: nhachicha

Diff for: driver-kotlin-extensions/build.gradle.kts

@@ -165,4 +165,4 @@ tasks.javadocJar.configure {
 // ===========================
 tasks.sourcesJar { from(project.sourceSets.main.map { it.kotlin }) }
 
-afterEvaluate { tasks.jar { manifest { attributes["Automatic-Module-Name"] = "org.mongodb.driver.kotlin.core" } } }
+afterEvaluate { tasks.jar { manifest { attributes["Automatic-Module-Name"] = "org.mongodb.driver.kotlin.extensions" } } }