ci: create dependabot.yml #1017

Job	Run time
build-vegafusion-jupyter-packages	12m 10s
build-vegafusion-packages	4m 8s
build-vegafusion-python-embed-linux-arm64	14m 36s
build-vegafusion-python-embed-linux-64	13m 39s
build-vegafusion-python-embed-osx-64	17m 17s
build-vegafusion-python-embed-osx-arm64	13m 48s
build-vegafusion-python-embed-win-64	30m 36s
build-vegafusion-server-linux-64	11m 13s
build-vegafusion-server-linux-arm64	13m 17s
build-vegafusion-server-osx-64	30m 40s
build-vegafusion-server-osx-arm64	9m 59s
build-vegafusion-server-win-64	27m 57s
build-vegafusion-wasm	9m 37s
check-rust	6m 40s
test-rust (ubuntu-20.04)	23m 55s
test-rust (windows-2022)	39m 17s
test-rust (macos-14)	31m 31s
test-vegafusion-python-linux-64	6m 59s
test-vegafusion-jupyter-linux-64	29m 5s
test-vegafusion-python-osx-arm64	4m 54s
test-vegafusion-python-win-64	10m 36s
	6h 1m 54s

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