Bump actions/checkout from 3 to 4 #7675

Job	Run time
smoke	3m 43s
mvn clean install - jdk17	13m 23s
mvn clean install - jdk11	17m 36s
gremlin-console	6m 54s
cache gremlin-server docker image	1m 56s
gremlin-server unified	22m 42s
gremlin-server default	21m 55s
mvn clean install - jdk8	13m 50s
spark core (ubuntu-latest)	12m 4s
spark gryo (ubuntu-latest)	10m 9s
spark core (windows-latest)	4m 4s
spark gryo (windows-latest)	3m 49s
neo4j-gremlin	9m 10s
python	6m 16s
javascript (ubuntu-latest)	6m 31s
go	4m 52s
.NET	5m 59s
gremlin-driver	4m 0s
	2h 48m 53s

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