Update requirements.txt

requirements.txt

@@ -1,4 +1,4 @@
-fastapi>=0.68.0
-uvicorn>=0.15.0
-selenium>=4.0.0
-pydantic>=1.8.0
+fastapi==0.103.1
+uvicorn==0.23.2
+selenium==4.10.0
+pydantic==2.3.0