add @ngxson to codeowners for tasks&gguf

Author: julien-c

CODEOWNERS

@@ -4,7 +4,7 @@
 
 # Ownership for the Tasks Package
 
-/packages/tasks/ @SBrandeis @gary149 @Wauplin @julien-c @pcuenca
+/packages/tasks/ @SBrandeis @gary149 @Wauplin @julien-c @pcuenca @ngxson
 
 # Ownership for the Hub Package
 
@@ -20,7 +20,7 @@
 
 # Ownership for the gguf Package
 
-/packages/gguf @mishig25 @julien-c
+/packages/gguf @mishig25 @ngxson @julien-c
 
 # Ownership for the space-header Package
 /packages/space-header @enzostvs