Fix typo in train split name (#3751)

* Fix typo in README guide

* Fix split naming and table alignment in README guide

* Fix split naming and table alignment in all datasets

* Fix previously malformed dataset cards

* Fix previously malformed dataset cards

Commit from https://github.com/huggingface/datasets/commit/af6e54febe3b822118dfed28ddb797d8350e5d27

README.md

@@ -83,9 +83,9 @@ A typical data point comprises a label which is out of 13 classes and a verse pa
 
 The data is split into a training and testing. The split is organized as the following 
 
-|           | Tain   | Test |
-|---------- | ------ | ---- |
-|data split | 47,124 | 8,316|
+|            |  train |  test |
+|------------|-------:|------:|
+| data split | 47,124 | 8,316 |
 
 ## Dataset Creation
 
@@ -123,7 +123,11 @@ The dataset does not contain any additional annotations.
 
 ## Considerations for Using the Data
 
-### Discussion of Social Impact and Biases
+### Social Impact of Dataset
+
+[More Information Needed]
+
+### Discussion of Biases
 
 [More Information Needed]