Update guide example to better reflect the intent (Kotlin#3292)

* Update guide example to better reflect the intent

Based on Kotlin#3202

Author: qwwdfsad

docs/topics/coroutine-context-and-dispatchers.md

@@ -334,8 +334,8 @@ fun main() = runBlocking<Unit> {
     }
     delay(500)
     request.cancel() // cancel processing of the request
-    delay(1000) // delay a second to see what happens
     println("main: Who has survived request cancellation?")
+    delay(1000) // delay the main thread for a second to see what happens
 //sampleEnd
 }
 ```
@@ -350,8 +350,8 @@ The output of this code is:
 ```text
 job1: I run in my own Job and execute independently!
 job2: I am a child of the request coroutine
-job1: I am not affected by cancellation of the request
 main: Who has survived request cancellation?
+job1: I am not affected by cancellation of the request
 ```
 
 <!--- TEST -->

kotlinx-coroutines-core/jvm/test/guide/example-context-06.kt

@@ -26,6 +26,6 @@ fun main() = runBlocking<Unit> {
     }
     delay(500)
     request.cancel() // cancel processing of the request
-    delay(1000) // delay a second to see what happens
     println("main: Who has survived request cancellation?")
+    delay(1000) // delay the main thread for a second to see what happens
 }

kotlinx-coroutines-core/jvm/test/guide/test/DispatcherGuideTest.kt

@@ -59,8 +59,8 @@ class DispatcherGuideTest {
         test("ExampleContext06") { kotlinx.coroutines.guide.exampleContext06.main() }.verifyLines(
             "job1: I run in my own Job and execute independently!",
             "job2: I am a child of the request coroutine",
-            "job1: I am not affected by cancellation of the request",
-            "main: Who has survived request cancellation?"
+            "main: Who has survived request cancellation?",
+            "job1: I am not affected by cancellation of the request"
         )
     }