Update Kotlin [1.6.0 -> 1.6.10], dokka [1.4.32 -> 1.6.10].

Also fix dokka config issue.

Author: greenrobot-team

build.gradle

@@ -22,9 +22,9 @@ buildscript {
         essentials_version = '3.1.0'
         junit_version = '4.13.2'
         mockito_version = '3.8.0'
-        kotlin_version = '1.6.0'
+        kotlin_version = '1.6.10'
         coroutines_version = '1.6.0-RC'
-        dokka_version = '1.4.32'
+        dokka_version = '1.6.10'
 
         println "version=$ob_version"
         println "objectboxNativeDependency=$ob_native_dep"

objectbox-kotlin/build.gradle

@@ -29,7 +29,7 @@ tasks.named("dokkaHtml") {
                 // Point to web javadoc for objectbox-java packages.
                 url.set(new URL("https://objectbox.io/docfiles/java/current/"))
                 // Note: Using JDK 9+ package-list is now called element-list.
-                packageListUrl.set(new URL(url, "element-list"))
+                packageListUrl.set(new URL("https://objectbox.io/docfiles/java/current/element-list"))
             }
         }
     }