Update taxonomy.json

taxonomy.json

@@ -258,7 +258,7 @@
              {"name": "Narrative Plot in Storytelling"}
              ]
          },
-         {"name": "Paraphrase Generation"},
+         {"name": "Paraphrase and Rephrase Generation"},
          {"name": "Writing and Editing Revisions"},
          {"name": "Lyrics Generation"},
          {"name": "Poetry Generation"},