Update CHANGELOG for #16279

Author: anGie44

CHANGELOG.md

@@ -8,6 +8,7 @@ FEATURES
 * **New Resource:** `aws_imagebuilder_image_pipeline` [GH-16299]
 * **New Resource:** `aws_imagebuilder_image_recipe` [GH-16218]
 * **New Resource:** `aws_msk_scram_secret_association` [GH-15302]
+* **New Resource:** `aws_networkfirewall_resource_policy` [GH-16279]
 
 ENHANCEMENTS