Update change log for v1.2.7 release

CHANGELOG.md

@@ -8,15 +8,32 @@ You can find a list of previous releases on the [github releases](https://github
 
 ## [Unreleased]
 ### Added
-- Added metrics to monitor task validation (#5466)
-- Added config map for kafka topic (#5473, #5474)
-- Add an "all results" query to scanner/fixer workflow (#5470)
+- Added a helper script to run cassandra and execute tests (#5620)
+- Scaffold StartWorkflowExecutionAsync API (#5621)
+- Add Workflow ID cache size metric (#5619)
 - Add retries into Scanner BlobWriter (#5471)
 - Added a unit test for the BlobStoreWriter (#5472)
+- Scaffold async workflow queue provider component (#5627)
+- Add debug logs in PinotTripleVisibilityManager for response comparator testing (#5631)
+- Add a middleware for comparator to use (#5637)
 
 ### Changed
-- Improves metric and error handling for history (#5469)
-- Minor change to include domainTag and pass domainName (#5468)
+- Get/Update DomainAsyncWorkflowConfiguraton methods in admin API and CLI (#5616)
+- Refactor persistence serializer tests and add more cases (#5625)
+- Replace JWT validation library (#5592)
+- Put a timeout for timer task deletion loop during shutdown (#5626)
+- Set proper max reset points (#5623)
+- Update run_cass_and_test.sh script to setup cassandra schemas (#5628)
+- Catch unit test failures in `make test` (#5635)
+
+## [1.2.7] - 2024-02-09
+See [Release Note](https://github.com/uber/cadence/releases/tag/v1.2.7) for details
+### Upgrade notes
+Cadence repo now has multiple submodules,
+the split and explanation in [PR](https://github.com/uber/cadence/pull/5609).
+
+In principle, "plugins" are "optional" and we should not be forcing all optional dependencies on all users of any of Cadence.
+Splitting dependencies into choose-your-own-adventure submodules is simply good library design for the ecosystem, and it's something we should be doing more of.
 
 ## [1.2.6] - 2023-12-14
 ### Added