Add Dependabot configuration #669

Job	Run time
initial-mvn-install	4m 32s
Integration Tests JDK - 21	9m 22s
Integration Tests Alternative Platform - windows-latest	8m 58s
Integration Tests - group-01	10m 49s
Integration Tests - group-02	8m 3s
Integration Tests - group-03	6m 59s
Integration Tests - group-04	6m 25s
Integration Tests - group-05	7m 51s
Integration Tests - group-06	6m 36s
Integration Tests - group-07	10m 10s
Integration Tests - group-08	6m 34s
Integration Tests - group-09	8m 30s
Integration Tests - group-10	7m 52s
	1h 42m 41s

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