Bump libntech from `469add7` to `cd68fbf` #975

Job	Run time
shellcheck_tests / Run shellcheck on shell scripts	1m 19s
unit_tests / Run Unit Tests	1m 15s
cifuzz_tests	0s
acceptance_tests	0s
macos_unit_tests	0s
asan_unit_tests	0s
static_check	0s
valgrind_check	0s
valgrind_tests	0s
	2m 34s

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