固定httpx版本解决兼容问题

pyproject.toml

@@ -8,7 +8,7 @@ authors = [{ name = "mixmoe", email = "[email protected]" }]
 requires-python = ">=3.9,<4.0"
 dependencies = [
     "fastapi>=0.110.2",
-    "httpx[http2]>=0.27.0",
+    "httpx[http2]<0.28.0",
     "uvicorn[standard]>=0.29.0",
     "confuse>=2.0.1",
     "loguru>=0.7.2",