Update nuttx submodule #1951

Job	Run time
variables	1s
fc_matrix (saluki-pi_amp) / build	9m 20s
fc_matrix (saluki-nxp93_flat) / build	6m 16s
fc_matrix (pixhawk) / build	6m 10s
fc_matrix (fmu-v6xrt) / build	7m 3s
fc_matrix (saluki-pi_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-pi/px4_bin_ed25519_... / build	9m 13s
fc_matrix (saluki-pi_default) / build	9m 16s
fc_matrix (saluki-v2_amp) / build	9m 1s
fc_matrix (saluki-pi_flat) / build	6m 50s
fc_matrix (saluki-v2_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v2/px4_bin_ed25519_... / build	9m 6s
fc_matrix (saluki-v2_default) / build	8m 52s
fc_matrix (saluki-v2_flat) / build	6m 56s
fc_matrix (saluki-v3_amp) / build	9m 11s
fc_matrix (saluki-v3_default) / build	9m 21s
fc_matrix (saluki-v3_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v3/px4_bin_ed25519_... / build	9m 3s
fc_matrix (saluki-v3_flat) / build	6m 36s
build px4fwupdater	1m 59s
upload builds to UAE artifactory	5m 10s
upload px4fwupdater to docker registry	1m 30s
upload px4fwupdater to UAE docker registry	0s
	2h 10m 54s

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