Update description

README.md

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 # বাংলা সাহিত্য (Bangla Sahitya or Bengali Literature)
 
-A non-exhaustive collection of Bengali literary works (poems, stories, novels, letters). These works span between the 8th and 20th centuries. All these works are in the public domain.
+A non-exhaustive collection of Bengali literary works (poems, stories, novels, songs, essays, letters) by more than 35 authors. These works span between the 8th and 20th centuries. All these works are in the public domain.
 
 The contents of some of the rows can be large, e.g., novels. Also, some of the earlier works may be noisy.