RFR: 7903999: Release jtreg 7.5.2 [v2]

[Christian Stein]

> Please review this change preparing the `7.5.2` release of jtreg.
> 
> The version number `7.6` will be restored on the main branch after the release; a dedidated `7.5.x` branch is not required, yet.

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Update CHANGELOG.md
  
  Fix typo

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Changes:
  - all: https://git.openjdk.org/jtreg/pull/263/files
  - new: https://git.openjdk.org/jtreg/pull/263/files/59cbca3f..f18faf87

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jtreg&pr=263&range=01
 - incr: https://webrevs.openjdk.org/?repo=jtreg&pr=263&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jtreg/pull/263.diff
  Fetch: git fetch https://git.openjdk.org/jtreg.git pull/263/head:pull/263

PR: https://git.openjdk.org/jtreg/pull/263