Update black to ^26.3

Author: fabaff

pyproject.toml

@@ -27,7 +27,7 @@ python = "^3.12"
 httpx = ">=0.28,<1"
 
 [tool.poetry.dev-dependencies]
-black = "^25.12"
+black = "^26.3"
 pytest = "^9"
 isort = "^5.11"
 pytest-httpx = ">0.15,<1"