chore(internal): bump httpx dependency (#2328)

Author: stainless-app[bot]

requirements-dev.lock

@@ -35,7 +35,7 @@ h11==0.14.0
     # via httpcore
 httpcore==1.0.2
     # via httpx
-httpx==0.25.2
+httpx==0.28.1
     # via cloudflare
     # via respx
 idna==3.4
@@ -75,7 +75,7 @@ python-dateutil==2.8.2
     # via time-machine
 pytz==2023.3.post1
     # via dirty-equals
-respx==0.20.2
+respx==0.22.0
 rich==13.7.1
 ruff==0.6.9
 setuptools==68.2.2
@@ -85,7 +85,6 @@ six==1.16.0
 sniffio==1.3.0
     # via anyio
     # via cloudflare
-    # via httpx
 time-machine==2.9.0
 tomli==2.0.2
     # via mypy

requirements.lock

@@ -25,7 +25,7 @@ h11==0.14.0
     # via httpcore
 httpcore==1.0.2
     # via httpx
-httpx==0.25.2
+httpx==0.28.1
     # via cloudflare
 idna==3.4
     # via anyio
@@ -37,7 +37,6 @@ pydantic-core==2.27.1
 sniffio==1.3.0
     # via anyio
     # via cloudflare
-    # via httpx
 typing-extensions==4.12.2
     # via anyio
     # via cloudflare