Merge pull request #1954 from Baeldung/update/elastic4s-client-esjava-9.1.0

Update elastic4s-client-esjava, ... from 9.0.0 to 9.1.0

Author: mergify[bot]

build.sbt

@@ -418,7 +418,7 @@ val circeVersion = "0.14.14"
 val monixVersion = "3.4.1"
 
 val sparkVersion = "4.0.0"
-val elastic4sVersion = "9.0.0"
+val elastic4sVersion = "9.1.0"
 
 val sparkCoreDep = "org.apache.spark" %% "spark-core" % sparkVersion
 val sparkSqlDep = "org.apache.spark" %% "spark-sql" % sparkVersion