Use consistent changelog formatting
Use date formats and empty line in between entries to be consistent with
entries from recent versions.
@@ -5,9 +5,9 @@ We also use this change log to document new features that maintain backward comp
## New features since last version update
-- November 2: Make RBD levels filterable [PR 1028](https://github.com/nextstrain/ncov/pull/1028)
-- October 21: Implement RBD-level coloring for BA.2 (21L) descendants. For background on this and lineage definitions please see [Variant report 2022-10-17](https://github.com/neherlab/SARS-CoV-2_variant-reports/blob/main/reports/variant_report_latest_draft.md). [PR 1018](https://github.com/nextstrain/ncov/pull/1018).
+- 2 November 2022: Make RBD levels filterable [PR 1028](https://github.com/nextstrain/ncov/pull/1028)
+- 21 October 2022: Implement RBD-level coloring for BA.2 (21L) descendants. For background on this and lineage definitions please see [Variant report 2022-10-17](https://github.com/neherlab/SARS-CoV-2_variant-reports/blob/main/reports/variant_report_latest_draft.md). [PR 1018](https://github.com/nextstrain/ncov/pull/1018).
## v12 (12 July 2022)
