chore(deps): update dependency httpx to ~0.28.0

Author: renovate[bot]

poetry.lock

@@ -49,7 +49,7 @@ crawlee = "~0.4.0"
 cryptography = ">=42.0.0"
 # TODO: relax the upper bound once the issue is resolved:
 # https://github.com/apify/apify-sdk-python/issues/348
-httpx = "~0.27.0"
+httpx = "~0.28.0"
 lazy-object-proxy = ">=1.10.0"
 scrapy = { version = ">=2.11.0", optional = true }
 typing-extensions = ">=4.1.0"