fix dependabot file (#684) #2138

Job	Run time
Test FFI (stable, ubuntu-latest)	35s
MSRV	26s
Test feature matrix	10m 37s
Test (stable, macos-latest)	44s
Test (stable, windows-latest)	2m 14s
Test (stable, ubuntu-latest)	32s
Documentation	29s
Lint	34s
	16m 11s

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