Fix bad link in debug-coroutines-with-idea.md (#2634)

Fix invalid link to api doc for `println()` function.

Author: GitHubPang

docs/topics/debug-coroutines-with-idea.md

@@ -21,7 +21,7 @@ The tutorial assumes you have prior knowledge of the [coroutines](coroutines-gui
     * Use the [`runBlocking()`](https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/run-blocking.html) block to wrap a coroutine.
     * Use the [`async()`](https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/async.html) function to create coroutines that compute deferred values `a` and `b`.
     * Use the [`await()`](https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-deferred/await.html) function to await the computation result.
-    * Use the [`println()`](https://kotlinlang.org//api/latest/jvm/stdlib/stdlib/kotlin.io/println.html) function to print computing status and the result of multiplication to the output.
+    * Use the [`println()`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/println.html) function to print computing status and the result of multiplication to the output.
 
     ```kotlin
     import kotlinx.coroutines.*
@@ -79,4 +79,4 @@ The tutorial assumes you have prior knowledge of the [coroutines](coroutines-gui
     * The second coroutine has computed its value and disappeared.
     * The third coroutine is calculating the value of `b` – it has the **RUNNING** status.
 
-Using IntelliJ IDEA debugger, you can dig deeper into each coroutine to debug your code.
+Using IntelliJ IDEA debugger, you can dig deeper into each coroutine to debug your code.