Bump actions/checkout from 3 to 4 #4902

Job	Run time
smoke	2m 44s
mvn clean install - jdk8	12m 31s
gremlin-server default	25m 9s
gremlin-server unified	24m 8s
cache gremlin-server docker image	2m 8s
spark gryo (ubuntu-latest)	9m 55s
spark core (ubuntu-latest)	10m 35s
spark gryo (windows-latest)	3m 24s
spark core (windows-latest)	2m 45s
gremlin-console	5m 52s
mvn clean install - jdk11	15m 41s
neo4j-gremlin	9m 30s
python	4m 44s
javascript (ubuntu-latest)	5m 8s
go	5m 20s
.NET	4m 57s
gremlin-driver	3m 36s
	2h 28m 7s

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