RFR: 7903397: Update changelog for jtreg 7.1.1 [v2]

[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 incrementally with one additional commit since the last revision:

  Fix tag names

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Changes:
  - all: https://git.openjdk.org/jtreg/pull/142/files
  - new: https://git.openjdk.org/jtreg/pull/142/files/e7b06032..b015d57e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jtreg&pr=142&range=01
 - incr: https://webrevs.openjdk.org/?repo=jtreg&pr=142&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 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