RFR: 8263593: Fix multiple typos in hsdis README

[Henri Tremblay]

8263593: Fix multiple typos in hsdis README

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Commit messages:
 - 8263593: Fix multiple typos in hsdis README

Changes: https://git.openjdk.java.net/jdk/pull/2685/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2685&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263593
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2685.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2685/head:pull/2685

PR: https://git.openjdk.java.net/jdk/pull/2685