Update requirements.txt

requirements.txt

@@ -15,6 +15,6 @@ python-multipart==0.0.6
 uvicorn==0.22.0
 docx2txt==0.8
 st-login-form==0.2.1
-sentence-transformers==2.2.2
-huggingface_hub==0.16.4
-transformers==4.32.0
+huggingface_hub==0.15.1
+transformers==4.21.0
+sentence-transformers==2.2.2