docs(changelog): Introduce breaking changes overview for v2.9 in release notes
@@ -86,7 +86,17 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
### Deprecations
-- TODO ([#XXX](https://github.com/kedacore/keda/issue/XXX))
+You can find all deprecations in [this overview](https://github.com/kedacore/keda/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3Abreaking-change) and [join the discussion here](https://github.com/kedacore/keda/discussions/categories/deprecations).
+
+New deprecation(s):
+
+- Prometheus metrics on KEDA Metric Server are deprecated in favor of Prometheus metrics on KEDA Operator ([#3972](https://github.com/kedacore/keda/issues/3972) | [Discussion](https://github.com/kedacore/keda/discussions/3973))
+
+Previously announced deprecation(s):
+
+- `rolloutStrategy` is deprecated in favor of `rollout.strategy` in ScaledJobs ([#3596](https://github.com/kedacore/keda/issues/3596) | [Discussion](https://github.com/kedacore/keda/discussions/3552))
+- `metadata.type` is deprecated in favor of the global `metricType` for CPU, Memory, Datadog scalers ([#2844](https://github.com/kedacore/keda/issues/2844) | [Discussion](https://github.com/kedacore/keda/discussions/3002))
+- Default checkpointing strategy for Azure Event Hubs scaler `azureFunctions` is deprecated in favor of `blobMetadata` ([#XXX](https://github.com/kedacore/keda/issues/3596) | [Discussion](https://github.com/kedacore/keda/discussions/3552))
### Breaking Changes
