Minor edits to whats-new
Minor edits to whats-new

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Former-commit-id: e6795a45744ddb0566a4f1cb9a74dbfe4318e38e
Former-commit-id: 7c8016ce87b1f8eebfc5de097526042caab07fa2
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine