build(deps): Update strum requirement from 0.25.0 to 0.26.1 #66

Job	Run time
avalanchego-conformance-tests	3m 25s
avalanchego-byzantine-tests	2m 34s
clippy	2m 4s
avalanchego-integration-tests	6m 37s
docs	1m 33s
fmt	6s
unit tests	3m 7s
	19m 26s

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