RFR: 7903397: Update changelog for jtreg 7.1.1 [v3]

[Christian Stein]

> Please review this commit that updates the changelog file to include a section for jtreg 7.1.1
> 
> It also adds the entry to the list of noteworthy unreleased changes of the upcoming jtreg 7.2 release.

Christian Stein has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Fix grammatic
 - Merge branch 'master' into 7903397-update-changelog-for-7.1.1
 - Fix tag names
 - 7903397: Update changelog for jtreg 7.1.1

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Changes: https://git.openjdk.org/jtreg/pull/142/files
 Webrev: https://webrevs.openjdk.org/?repo=jtreg&pr=142&range=02
  Stats: 18 lines in 1 file changed: 17 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jtreg/pull/142.diff
  Fetch: git fetch https://git.openjdk.org/jtreg pull/142/head:pull/142

PR: https://git.openjdk.org/jtreg/pull/142