Create dependabot.yml

[MilesCranmer]

Just targets github-actions right now

[github-actions]

Benchmark Results

	main	f306043...	t[main]/t[f306043...]
Quantity/creation/Quantity(x)	2.79 ± 0 ns	2.79 ± 0 ns	1
Quantity/creation/Quantity(x, length=y)	3.41 ± 0.01 ns	3.41 ± 0.01 ns	1
Quantity/with_numbers/*real	3.11 ± 0.01 ns	3.1 ± 0.01 ns	1
Quantity/with_numbers/^int	8.05 ± 1.9 ns	8.05 ± 1.8 ns	1
Quantity/with_numbers/^int * real	8.37 ± 1.9 ns	8.37 ± 1.9 ns	1
Quantity/with_quantity/+y	4.04 ± 0.001 ns	4.04 ± 0.001 ns	1
Quantity/with_quantity//y	3.11 ± 0.001 ns	3.11 ± 0.001 ns	1
Quantity/with_self/dimension	3.1 ± 0.01 ns	3.1 ± 0.01 ns	1
Quantity/with_self/inv	3.11 ± 0.01 ns	3.11 ± 0.001 ns	1
Quantity/with_self/ustrip	2.79 ± 0.01 ns	2.79 ± 0.97 ns	1
QuantityArray/broadcasting/multi_array_of_quantities	0.149 ± 0.0013 ms	0.145 ± 0.00073 ms	1.03
QuantityArray/broadcasting/multi_normal_array	0.0529 ± 0.00016 ms	0.0529 ± 0.00019 ms	1
QuantityArray/broadcasting/multi_quantity_array	0.158 ± 0.00042 ms	0.158 ± 0.00046 ms	1
QuantityArray/broadcasting/x^2_array_of_quantities	22.7 ± 1.2 μs	22.7 ± 1.5 μs	1
QuantityArray/broadcasting/x^2_normal_array	4.51 ± 1 μs	4.71 ± 1.3 μs	0.958
QuantityArray/broadcasting/x^2_quantity_array	6.95 ± 0.3 μs	6.97 ± 0.28 μs	0.997
QuantityArray/broadcasting/x^4_array_of_quantities	0.0785 ± 0.00041 ms	0.0785 ± 0.00044 ms	1
QuantityArray/broadcasting/x^4_normal_array	0.0498 ± 0.00017 ms	0.0498 ± 0.00016 ms	1
QuantityArray/broadcasting/x^4_quantity_array	0.05 ± 0.00015 ms	0.0499 ± 0.00015 ms	1
time_to_load	0.125 ± 0.0017 s	0.124 ± 0.0003 s	1.01

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).