Update taxonomy.json

taxonomy.json

@@ -196,7 +196,11 @@
         "name": "Authorship Verification"
     },
     {
-        "name": "Automatic Speech Recognition (ASR)"
+        "name": "Audio Generation and Processing",
+        "children":[
+          {"name": "Automatic Speech Recognition (ASR)"},
+          {"name": "Speech Synthesis"}
+        ]
     },
     {
         "name": "Acronyms and Abbreviations Detection and Expansion"