Update CHANGELOG

Author: Wilken Rivera

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 0.2.11 (Upcoming)
+
+* sdk: The SourceImageID field for registry/image.Image is now optional;
+    calling Image#Validate will nolonger error if SourceImageID is empty.
+    [GH-90](https://github.com/hashicorp/packer-plugin-sdk/pull/90)
+
 ## 0.2.10 (December 15, 2021)
 
 * sdk: Security release with Go 1.7.5 to address [CVE-2021-44717](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44717). [GH-93](https://github.com/hashicorp/packer-plugin-sdk/pull/93)