make the modulation field of a baseband recording 'IQ' instead of 'Un… #1373

Job	Run time
build_debian_buster	3m 4s
build_android	12m 17s
build_debian_bullseye	3m 6s
build_debian_bookworm	3m 39s
build_macos_arm	2m 44s
build_debian_sid	3m 45s
build_macos_intel	5m 8s
build_raspios_bullseye_armhf	8m 59s
build_ubuntu_focal	4m 8s
build_ubuntu_jammy	3m 0s
build_ubuntu_mantic	3m 21s
build_ubuntu_noble	3m 55s
build_windows	13m 7s
check_formatting	14s
check_spelling	16s
create_full_archive	6s
update_nightly_release	13s
	1h 11m 2s

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