doc(changelog): Add changelog for spinnaker/orca#4804 (#475)

content/en/docs/releases/next-release-preview/index.md

@@ -9,4 +9,32 @@ Please make a pull request to describe any changes you wish to highlight
 in the next release of Spinnaker. These notes will be prepended to the release
 changelog.
 
-## Coming Soon in Release 1.37
+## Coming Soon in Release 1.37
+
+### Orca
+With https://github.com/spinnaker/orca/pull/4804, the api `/applications/{application}/pipelines?expand=false&limit=2` performance is improved when using sql as the backend. 
+Orca's queries to its sql db are optimized while handling the data obtained from front50.
+TaskController is refactored to support externalized config properties.
+
+#### Breaking changes:
+These configuration properties:
+```yaml
+tasks:
+   days-of-execution-history:  
+   number-of-old-pipeline-executions-to-include: 
+```
+are replaced by the below configuration along with few more newly added ones:
+```yaml
+tasks:
+   controller:
+      days-of-execution-history: 
+      number-of-old-pipeline-executions-to-include: 
+
+      optimize-execution-retrieval: <boolean>
+      max-execution-retrieval-threads:
+      max-number-of-pipeline-executions-to-process: 
+      execution-retrieval-timeout-seconds: 
+```
+
+
+