8332099: Add @since to package-info in jdk.jsobject

[nizarbenalla]

Simple code cleanup.
If you're reviewing this, thanks.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8332099: Add @<!---->since to package-info in jdk.jsobject (Sub-task - P4)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/19197/head:pull/19197
$ git checkout pull/19197

Update a local copy of the PR:
$ git checkout pull/19197
$ git pull https://git.openjdk.org/jdk.git pull/19197/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 19197

View PR using the GUI difftool:
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Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/19197.diff

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[bridgekeeper]

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[openjdk]

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See the Progress checklist in the description for automated requirements.

[openjdk]

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[AlanBateman]

/label add client

[openjdk]

@AlanBateman
The client label was successfully added.

[mlbridge]

Webrevs

• 00: Full (cfadd6e7)