RFR: 2290: Update PullRequest::updateReview

[Zhao Song]

In [SKARA-2279](https://bugs.openjdk.org/browse/SKARA-2279), I changed the type of id from int to String in Review.java, but I didn't update the type of id in the interface of PullRequest::updateReview.

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Commit messages:
 - SKARA-2290

Changes: https://git.openjdk.org/skara/pull/1659/files
  Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1659&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-2290
  Stats: 5 lines in 5 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/skara/pull/1659.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1659/head:pull/1659

PR: https://git.openjdk.org/skara/pull/1659