RFR: 6391806: JLabel and AbstractButton's imageUpdate method should be better specified [v7]

[Abhishek Kumar]

On Mon, 18 Jul 2022 04:54:54 GMT, Abhishek Kumar <duke at openjdk.org> wrote:

>> JLabel and AbstractButton's imageUpdate method description updated.
>
> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   JLabel and AbstractButton's imageUpdate method description updated

params added for JLabel's imageUpdate method and {@code ...} style used in description.

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PR: https://git.openjdk.org/jdk/pull/9240