Update taxonomy.json

taxonomy.json

@@ -192,9 +192,6 @@
     {
         "name": "Discourse Analysis"
     },
-    {
-        "name": "Prompt Engineering"
-    },
     {
         "name": "Audio Generation and Processing",
         "children":[
@@ -202,6 +199,9 @@
           {"name": "Speech Synthesis"}
         ]
     },
+    {
+        "name": "Prompt Engineering"
+    },
     {
         "name": "Authorship Verification"
     },
@@ -306,9 +306,15 @@
         ]
     },
     {
-        "name": "Information Filtering",
+        "name": "Information Retrieval",
         "children": [
-         {"name": "Recommender Systems"}
+         {"name": "Information Filtering",
+           "children":[
+             {"name": "Recommender Systems"}
+           ]
+         },
+         {"name": "Search Engines"}
+         },
         ]
     },
     {