Bump github.com/spf13/pflag from 1.0.5 to 1.0.6 #3826

Job	Run time
e2e (v1.29.8, v0.56.8)	20m 49s
e2e (v1.29.8, v0.56.8)	20m 49s
test-docker-build (base)	38s
test-docker-build (base)	38s
e2e (v1.29.8, v0.65.6)	39m 58s
e2e (v1.29.8, v0.65.6)	19m 10s
unit	3m 35s
unit	3m 35s
test-docker-build (git)	1m 3s
test-docker-build (git)	1m 3s
test-docker-build (image-processing)	49s
test-docker-build (image-processing)	49s
e2e (v1.31.0, v0.56.8)	21m 30s
e2e (v1.31.0, v0.56.8)	21m 30s
test-docker-build (waiter)	46s
test-docker-build (waiter)	46s
e2e (v1.31.0, v0.65.6)	19m 35s
e2e (v1.31.0, v0.65.6)	19m 35s
integration (v1.29.8, v0.56.8)	28m 3s
integration (v1.29.8, v0.56.8)	28m 3s
integration (v1.29.8, v0.65.6)	27m 36s
integration (v1.29.8, v0.65.6)	27m 36s
integration (v1.31.0, v0.56.8)	27m 29s
integration (v1.31.0, v0.56.8)	27m 29s
integration (v1.31.0, v0.65.6)	27m 20s
integration (v1.31.0, v0.65.6)	27m 8s
	6h 57m 22s

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