Librarian Bot: Add language metadata for dataset

README.md

@@ -1,16 +1,18 @@
 ---
+language:
+- en
 license: mit
 dataset_info:
   config_name: plain_text
   features:
-    - name: text
-      dtype: string
-    - name: label
-      dtype: int64
-    - name: source_name
-      dtype: string
-    - name: sentence_id
-      dtype: string
+  - name: text
+    dtype: string
+  - name: label
+    dtype: int64
+  - name: source_name
+    dtype: string
+  - name: sentence_id
+    dtype: string
   splits:
-    - name: train
+  - name: train
 ---