Update plugin category and tags to NLP

Author: gsaint

plugin.json

@@ -3,7 +3,7 @@
     "version": "1.3.1",
     "meta": {
         "label": "Text Preparation",
-        "category": "Natural Language Processing",
+        "category": "NLP",
         "description": "Prepare text data with language detection, spell checking and text cleaning",
         "author": "Dataiku (CaraML)",
         "icon": "icon-align-justify",