RFR: 8318702: G1: Fix nonstandard indentation in g1HeapTransition.cpp

[Thomas Schatzl]

Hi all,

  please review this trivial change to indentation in [g1HeapTransition.cpp](https://github.com/openjdk/jdk/compare/master...tschatzl:jdk:submit/8318702-indentation-g1heaptransition#diff-8b92b84617e96611627362128515c65c52cadc1cfec3ec6c986c780a6d744e5f).

Test: local compilation.

Thanks,
  Thomas

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Commit messages:
 - 8318702 initial version

Changes: https://git.openjdk.org/jdk/pull/16339/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16339&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318702
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/16339.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16339/head:pull/16339

PR: https://git.openjdk.org/jdk/pull/16339