Added "benczechmark_dialect" to `tasks_metadata.json`

tasks_metadata.json

@@ -363,6 +363,13 @@
     "category": "Language Modeling",
     "short_name": "CNC – Spoken"
   },
+  "benczechmark_dialect": {
+    "name": "Czech National Corpus – Dialect",
+    "source_url": "https://huggingface.co/datasets/CZLC/CNC_Dialekt",
+    "abbreviation": "CNC-DIAL",
+    "category": "Language Modeling",
+    "short_name": "CNC – DIALEKT"
+  },
   "benczechmark_snli": {
     "name": "Czech SNLI",
     "source_url": "https://huggingface.co/datasets/CZLC/snli",