Libfabric: update code owners (#971)

Signed-off-by: Ovidiu Mara <ovidium@nvidia.com>

Author: ovidiusm

CODEOWNERS

@@ -31,6 +31,6 @@ CODEOWNERS @ai-dynamo/Devops @ai-dynamo/nixl-maintainers
 /benchmark @aranadive @ovidiusm @brminich
 
 # Libfabric Plugins
-/src/plugins/libfabric* @yexiang-aws @akkart-aws
-/src/utils/libfabric @yexiang-aws @akkart-aws
-/test/unit/utils/libfabric @yexiang-aws @akkart-aws
+/src/plugins/libfabric* @yexiang-aws @akkart-aws @fengjica
+/src/utils/libfabric @yexiang-aws @akkart-aws @fengjica
+/test/unit/utils/libfabric @yexiang-aws @akkart-aws @fengjica