navigator: increase stack by 30 bytes #32303

Job	Run time
build (validate_module_configs)	1m 28s
build (tests_coverage)	11m 47s
build (px4_fmu-v2_default stack_check)	4m 15s
build (check_newlines)	2m 12s
build (check_format)	2m 5s
build (tests)	8m 43s
build (NO_NINJA_BUILD=1 px4_fmu-v5_default)	4m 48s
build (shellcheck_all)	2m 26s
build (module_documentation)	1m 56s
build (NO_NINJA_BUILD=1 px4_sitl_default)	4m 18s
build (px4_sitl_allyes)	8m 2s
	52m 0s

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