RFR: Improve sponsor message

[Robin Westberg]

Hi all,

Please review this small change that improves the wording when a PR with a specified integration hash needs sponsoring.

Best regards,
Robin

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Commits:
 - 737736f6: Improve sponsor message

Changes: https://git.openjdk.java.net/skara/pull/387/files
 Webrev: https://webrevs.openjdk.java.net/skara/387/webrev.00
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/387.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/387/head:pull/387

PR: https://git.openjdk.java.net/skara/pull/387