Drop release-0.13 from dependabot config #532

Job	Run time
Clean up generated files	36s
Images	1m 22s
Clusters	1m 28s
Clean up clusters	1m 42s
Compilation	44s
Build multi-arch images	2m 20s
Deployment (operator)	2m 27s
Deployment (helm)	2m 19s
E2E	2m 55s
Multiple gateways support	1m 39s
Deployment (globalnet, operator)	2m 31s
Post mortem	2m 10s
Deployment (globalnet, helm)	2m 23s
Deployment (air-gap)	3m 4s
Unit tests	1m 37s
Deployment (air-gap, globalnet)	3m 15s
Deployment (air-gap, lighthouse)	2m 59s
Deployment (air-gap, ovn)	8m 45s
Deployment (dual-stack)	2m 36s
Deployment (ovn)	8m 19s
Deployment (ovn-ic)	8m 47s
Deployment (operator, lighthouse)	2m 44s
Deployment (helm, lighthouse)	2m 7s
Deployment (load-balancer)	2m 51s
Deployment (prometheus)	2m 38s
	1h 14m 18s

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