doc: requirements: disallow breathe 4.33.0
doc: requirements: disallow breathe 4.33.0

Sphinx 4.33.0 introduces Graphviz support, but the Graphviz
configuration value names clash with the Sphinx built-in Graphviz
extension.

Issue: https://github.com/michaeljones/breathe/issues/803

Signed-off-by: Gerard Marull-Paretas <bedb45f43a286e49f4dcda039a436b216ae61ef3@nordicsemi.no>

galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr