fix: `httponly` correction in CSRFMiddleware #4020

Job	Run time
mypy	1m 25s
slotscheck	35s
pyright	58s
Test server integration (uvicorn<0.27.0)	55s
Test Minimal Application with Base Dependencies	31s
test-platform-compat	0s
Test Minimal Pydantic 1 application	44s
Test server integration (uvicorn>=0.27.0)	52s
validate	13s
test (3.12) / test	3m 29s
test (3.10) / test	2m 4s
test (3.8) / test	3m 5s
test (3.11) / test	1m 49s
test (3.9) / test	2m 3s
build-docs	2m 43s
codeql	3m 11s
upload-test-coverage	20s
sonar	1m 9s
	26m 6s

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