fix(example): move sleep tests to own package

Author: not-matthias

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: codspeed-macro
     strategy:
       matrix:
-        target: [example, example/compat, example/very/nested/module]
+        target: [example, example/compat, example/timing, example/very/nested/module]
     steps:
       - uses: actions/checkout@v4
         with:

example/sleep_test.go renamed to example/timing/sleep_test.go

@@ -1,4 +1,4 @@
-package example
+package timing
 
 import (
 	"testing"