Bump org.apache.spark:spark-core_2.12 from 3.1.1 to 3.3.3 (#74)

Bumps org.apache.spark:spark-core_2.12 from 3.1.1 to 3.3.3.

---
updated-dependencies:
- dependency-name: org.apache.spark:spark-core_2.12
  dependency-type: direct:production
...

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pom.xml

@@ -16,7 +16,7 @@
         <java.version>1.8</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
-        <spark.version>3.1.1</spark.version>
+        <spark.version>3.3.3</spark.version>
     </properties>
 
     <build>