Fix public header hygiene wording

Replace legacy decoder wording in public API comments with codec terminology. This satisfies the public header hygiene gate without changing the decode API or runtime behavior.

Author: bboczula

include/AssetSuite/AssetSuite.h

@@ -64,9 +64,9 @@ namespace AssetSuite
 	// invalid blob handle, including a handle from another context, returns
 	// Result::ErrorInvalidHandle. Passing a null outImage or non-null
 	// *outImage returns Result::ErrorInvalidArgument. Inputs that cannot be
-	// routed to a registered image decoder return
+	// routed to a registered image codec return
 	// Result::ErrorUnsupportedFormat. Recognized but malformed image bytes
-	// return Result::ErrorMalformedData where the selected decoder can
+	// return Result::ErrorMalformedData where the selected codec can
 	// distinguish malformed input, otherwise Result::ErrorDecodeFailed.
 	ASSET_SUITE_API Result DecodeImage(ContextHandle context, BlobHandle blob, ImageHandle* outImage);