RFR: CODETOOLS-7903231: Add changelog to jtreg

[Christian Stein]

On Mon, 17 Oct 2022 22:45:12 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> CODETOOLS-7903231: Add changelog to jtreg

Looks good!
For each recent version, it contains interesting changes in human-readable form as well as links to all commits.

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Marked as reviewed by cstein (Author).

PR: https://git.openjdk.org/jtreg/pull/133