Pontoon: Update Arabic (ar) localization of TW Power Tools

Co-authored-by: Medelinor <eloueryaghlymohamed@gmail.com>
diff --git a/src/static/_locales/ar/messages.json b/src/static/_locales/ar/messages.json
index d528fe0..3a12b2c 100644
--- a/src/static/_locales/ar/messages.json
+++ b/src/static/_locales/ar/messages.json
@@ -413,6 +413,10 @@
     "message": "انتهاك قانوني",
     "description": "Abuse category (when the violation is related to legal)"
   },
+  "inject_extrainfo_profile_abusecategory_csai": {
+    "message": "انتهاك CSAI",
+    "description": "Abuse category (when the violation is related to CSAI)"
+  },
   "inject_extrainfo_profile_abusecategory_other": {
     "message": "انتهاك آخر",
     "description": "Abuse category"