RFR: CODETOOLS-7903114: jcstress: Amend AdvancedJMM_07_SemiVolatile test result

[Aleksey Shipilev]

A slight documentation regression since [CODETOOLS-7903107](https://bugs.openjdk.java.net/browse/CODETOOLS-7903107).

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Commit messages:
 - Fix

Changes: https://git.openjdk.java.net/jcstress/pull/112/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=112&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7903114
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/112.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/112/head:pull/112

PR: https://git.openjdk.java.net/jcstress/pull/112