chore(deps): update dependency httpx to v0.28.1

Reviewed-on: #1

renovate.json

@@ -0,0 +1,3 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+}

requirements.txt

@@ -1,6 +1,6 @@
 # Core
 asyncpg==0.29.0
-httpx==0.27.0
+httpx==0.28.1
 fastapi==0.111.0
 uvicorn[standard]==0.29.0
 pydantic==2.7.0
@@ -15,4 +15,4 @@ vaderSentiment==3.3.2
 # Testing
 pytest==8.2.0
 pytest-asyncio==0.23.6
-httpx==0.27.0
+httpx==0.28.1