Update changelog

Author: hc-github-team-tf-provider-devex

.changes/0.17.0.md

@@ -0,0 +1,7 @@
+## 0.17.0 (June 28, 2023)
+
+ENHANCEMENTS:
+
+* tfprotov5: Added `DynamicValue` type `IsNull` method, which enables checking if the value is null without type information and fully decoding underlying data ([#305](https://github.com/hashicorp/terraform-plugin-go/issues/305))
+* tfprotov6: Added `DynamicValue` type `IsNull` method, which enables checking if the value is null without type information and fully decoding underlying data ([#305](https://github.com/hashicorp/terraform-plugin-go/issues/305))
+

.changes/unreleased/ENHANCEMENTS-20230627-125806.yaml

@@ -1,3 +1,10 @@
+## 0.17.0 (June 28, 2023)
+
+ENHANCEMENTS:
+
+* tfprotov5: Added `DynamicValue` type `IsNull` method, which enables checking if the value is null without type information and fully decoding underlying data ([#305](https://github.com/hashicorp/terraform-plugin-go/issues/305))
+* tfprotov6: Added `DynamicValue` type `IsNull` method, which enables checking if the value is null without type information and fully decoding underlying data ([#305](https://github.com/hashicorp/terraform-plugin-go/issues/305))
+
 ## 0.16.0 (June 16, 2023)
 
 ENHANCEMENTS: