feat: enable Dependabot for GitHub actions #148

Job	Run time
get_datasets	17s
groovy_vs_cpp (pass1/rga_fa18_inbending)	32m 47s
groovy_vs_cpp (pass1/rga_fa18_outbending)	36m 12s
groovy_vs_cpp (pass1/rga_sp19)	24m 30s
groovy_vs_cpp (pass1/rgb_fa19)	23m 59s
groovy_vs_cpp (pass1/rgb_sp19)	48m 45s
groovy_vs_cpp (pass1/rgb_wi20)	35m 14s
groovy_vs_cpp (pass1/rgc_su22)	1h 11m 22s
groovy_vs_cpp (pass1/rgk_fa18_6.5GeV)	21m 26s
groovy_vs_cpp (pass1/rgk_fa18_7.5GeV)	29m 10s
groovy_vs_cpp (pass1/rgm_fa21)	1h 39m 28s
report	1s
	7h 3m 11s

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