KMComposerWinTest:Add explaination for sleep.

2 jobs for master in 26 minutes and 6 seconds (queued for 158 minutes and 41 seconds)
Status Job ID Name Coverage
  Build
passed #93171
build_clazy_clang_tidy

00:13:59

passed #93170
linux kf5-qt5 qt5.15

00:12:07

11.0%