Add more details to FrameStateTest.java test instructions

Frame does not restore to normal after iconfied state in windows 10 & windows 11
Step to reproduce
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1) Run the manual https://github.com/openjdk/jdk/blob/master/test/jdk/java/awt/Frame/FrameStateTest/FrameStateTest.java state
2) Select Frame state NORMAL & Frame non-resizable checkbox
3) Click on "Create Frame" button.
4) "Frame State Test ( Window 2) test frame should be visible
5) Click on "Iconify & restore" button -> "Frame State Test ( Window 2) test frame is iconified and restored
6) Click on "hide & show" button -> "Frame State Test ( Window 2) test frame" gets hidden and shown
7) Click on "hide, iconfify and show" button -> "Frame State Test ( Window 2) test frame" is
a) Hidden
b) Iconified
c) "Frame State Test ( Window 2) test fram" is not "showed" . User has to manually click on the iconified and select the "Frame State Test ( Window 2) test frame" to restore the frame.
If you see the same then the bug is reproduced.

NOTE: This is not an issue but ambiguity in test instructions. The test instructions will be updated for clarity.