add docs' link to the root endpoint

src/main_sentiment.py

@@ -27,6 +27,7 @@ def read_root():
     "Home endpoint"
     return {"greeting": "Hello World..!", 
             "cohort": "2",
+            "docs": "https://eaedk-tweetsentimentanalysisapi.hf.space/docs",
             }
 
 @app.post("/predict")