docs(CHANGELOG): add entry for 1149

Author: philippschulte

CHANGELOG.md

@@ -11,6 +11,7 @@
 - fix(header): preserve optional bool field `ignore_if_set` during updates and add acceptance test coverage ([#1142](https://github.com/fastly/terraform-provider-fastly/pull/1142))
 - fix(image_optimizer_default_settings): preserve optional bool fields (`allow_video`, `webp`, `upscale`) during updates and add acceptance test coverage ([#1145](https://github.com/fastly/terraform-provider-fastly/pull/1145))
 - fix(logging_kafka): preserve optional bool fields (`use_tls`, `parse_log_keyvals`) during updates and add acceptance test coverage ([#1147](https://github.com/fastly/terraform-provider-fastly/pull/1147))
+- fix(product_enablement): ensure `ddos_protection` mode updates are applied ([#1149](https://github.com/fastly/terraform-provider-fastly/pull/1149))
 
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