RFR: 8340306: Add border around instructions in PassFailJFrame

[Alexey Ivanov]

On Tue, 17 Sep 2024 12:39:20 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> A trivial change which adds border around instruction text. It makes the text easier to read.

**Updated look:**

![Screenshot of PrintLatinCJKTest with border around text](https://github.com/user-attachments/assets/93311a78-6339-42f0-97e6-89661bb21743)

The text is no longer attaches to the left of the frame.

**Previous look:**

![Screenshot of PrintLatinCJKTest without border around text](https://github.com/user-attachments/assets/516c168d-94ea-4df8-befb-5afc3559df37)

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PR Comment: https://git.openjdk.org/jdk/pull/21038#issuecomment-2355679301