docs: release notes for the v10.2.0 release

Author: AndrewKushnir

CHANGELOG.md

@@ -1,3 +1,24 @@
+<a name="10.2.0"></a>
+# 10.2.0 (2020-10-21)
+
+
+### Bug Fixes
+
+* **core:** guard reading of global `ngDevMode` for undefined. ([#36055](https://github.com/angular/angular/issues/36055)) ([02405f1](https://github.com/angular/angular/commit/02405f1))
+* **platform-server:** Resolve absolute URL from baseUrl ([#39334](https://github.com/angular/angular/issues/39334)) ([71fb99f](https://github.com/angular/angular/commit/71fb99f))
+
+
+### BREAKING CHANGES
+
+* **platform-server:** If you use `useAbsoluteUrl` to setup `platform-server`, you now need to
+also specify `baseUrl`.
+We are intentionally making this a breaking change in a minor release,
+because if `useAbsoluteUrl` is set to `true` then the behavior of the
+application could be unpredictable, resulting in issues that are hard to
+discover but could be affecting production environments.
+
+
+
 <a name="11.0.0-next.6"></a>
 # 11.0.0-next.6 (2020-10-14)