build: bump version number to 13.5.1 (#1018) #2568

Job	Run time
validation / Dependency info	5s
validation / GitHub context	2s
validation / Build coatjava	1m 55s
validation / Configuration files	12s
validation / Report multiplicity	1s
validation / Event generation	1s
validation / Run	1s
validation / Report efficiency	1s
	2m 18s

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