[jdk17u-dev] RFR: 8295429: Update harfbuzz md file

[Goetz Lindenmaier]

I backport this for parity with 17.0.6-oracle.

Did not apply clean because of a white space at the line end in 17.

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Commit messages:
 - Backport 21aeb9e7946fc7450ee48939944a69c8aa04bcce

Changes: https://git.openjdk.org/jdk17u-dev/pull/818/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=818&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295429
  Stats: 16 lines in 1 file changed: 8 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/818.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/818/head:pull/818

PR: https://git.openjdk.org/jdk17u-dev/pull/818