bump codecov #260

Job	Run time
build (rustjswasm, macos-latest)	9m 2s
build (jupyter, ubuntu-latest)	1m 58s
build (python, ubuntu-latest)	20s
build (rustjswasm, ubuntu-latest)	8m 14s
build (cppjswasm, macos-latest)	2m 44s
build (cppjswasm, ubuntu-latest)	2m 5s
build (js, macos-latest)	54s
build (js, ubuntu-latest)	1m 3s
build (rust, macos-latest)	7m 34s
build (rust, ubuntu-latest)	5m 33s
build (jupyter, macos-latest)	1m 45s
build (cpp, ubuntu-latest)	1m 28s
build (python, macos-latest)	30s
build (cpp, macos-latest)	1m 12s
	44m 22s

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