build(deps): update bitflags requirement from 1.2.1 to 2.6.0 #7

Job	Run time
formatting	6s
internal-tests (ardupilotmega)	1m 2s
internal-tests (asluav)	1m 7s
internal-tests (matrixpilot)	1m 4s
linting	34m 54s
internal-tests (minimal)	1m 1s
mavlink-dump	57s
internal-tests (paparazzi)	1m 3s
internal-tests (python_array_test)	1m 2s
msrv	3m 47s
internal-tests (slugs)	1m 1s
internal-tests (standard)	1m 2s
internal-tests (test)	1m 0s
internal-tests (ualberta)	1m 1s
internal-tests (uavionix)	37s
internal-tests (icarous)	1m 5s
internal-tests (common)	1m 3s
docs	0s
build	0s
test-embedded-size	0s
	52m 52s

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