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

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Former-commit-id: 76b9902d8e366dd4caaf70c07c8292fea446af4c
Former-commit-id: 747d1919e99f03b51e18f8aa3082fc136aa706b1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine