pyproject.toml: update black development dependency version.

Author: jayaddison

pyproject.toml

@@ -15,7 +15,7 @@ apiron = "^7.1.0"
 munch = "^4.0.0"
 cryptography = "^42.0.0"
 
-black = { version = "^24.3.0", optional = true }
+black = { version = "^24.4.0", optional = true }
 pytest = { version = "^8.1.1", optional = true }
 responses = { version = "^0.25.0", optional = true }
 munch-stubs = { version = "^0.1.2", optional = true }