feat: upgrade minimum `litestar-htmx` version #4443

Job	Run time
pyright	36s
mypy	58s
validate	16s
slotscheck	20s
Test server integration (uvicorn<0.27.0)	45s
Test Minimal Application with Base Dependencies	15s
Test server integration (uvicorn>=0.27.0)	43s
Test Minimal Pydantic 1 application	14s
test-platform-compat	0s
test (3.10) / test	1m 44s
test (3.11) / test	1m 39s
test (3.12) / test	3m 7s
test (3.8) / test	2m 39s
test (3.9) / test	1m 48s
build-docs	2m 25s
upload-test-coverage	17s
codeql	1m 54s
sonar	1m 23s
	21m 3s

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