Fix tokenize_text function to correct token end index and remove unused 'supervision' package from requirements.txt

app.py

@@ -18,6 +18,6 @@ async def tokenize_text(request: TokenizeRequest):
             "start_char": token.idx,
             "end_char": token.idx + len(token.text),
             "start": token.i,
-            "end": token.i + 1
+            "end": token.i
         })
     return tokens

requirements.txt

@@ -1,5 +1,4 @@
 fastapi
 uvicorn[standard]
-supervision
 spacy
 pydantic