Fix a broken guide example

Author: dkhalanskyjb

Diff for: docs/topics/coroutine-context-and-dispatchers.md

@@ -115,7 +115,7 @@ Produces the output:
 ```text
 Unconfined      : I'm working in thread main
 main runBlocking: I'm working in thread main
-Unconfined      : After delay in thread DefaultDispatcher oroutine#2
+Unconfined      : After delay in thread DefaultDispatcher-worker-1 @coroutine#2
 main runBlocking: After delay in thread main
 ```
 

Diff for: kotlinx-coroutines-core/jvm/test/guide/test/DispatcherGuideTest.kt

@@ -20,7 +20,7 @@ class DispatcherGuideTest {
         test("ExampleContext02") { kotlinx.coroutines.guide.exampleContext02.main() }.verifyLinesStart(
             "Unconfined      : I'm working in thread main",
             "main runBlocking: I'm working in thread main",
-            "Unconfined      : After delay in thread DefaultDispatcher oroutine#2",
+            "Unconfined      : After delay in thread DefaultDispatcher-worker-1 @coroutine#2",
             "main runBlocking: After delay in thread main"
         )
     }