fix: add updated jar files for scala 2.12

Consistent with code for scala 2.13.

Author: kx79wq

tests/jars/histogrammar-sparksql_2.12-1.0.30.jar

@@ -21,18 +21,9 @@ def get_spark():
 
     current_path = Path(__file__).resolve().parent
 
-    if int(pyspark_version[0]) == 2:
-        scala = "2.11"
-        hg_version = "1.0.20"
-    elif int(pyspark_version[0]) == 3:
-        scala = "2.12"
-        hg_version = "1.0.20"
-    else:  # spark 4+
-        scala = "2.13"
-        hg_version = "1.0.30"
-
-    hist_spark_jar = current_path / f"jars/histogrammar-sparksql_{scala}-{hg_version}.jar"
-    hist_jar = current_path / f"jars/histogrammar_{scala}-{hg_version}.jar"
+    scala = "2.12" if int(pyspark_version[0]) == 3 else "2.13"
+    hist_spark_jar = current_path / f"jars/histogrammar-sparksql_{scala}-1.0.30.jar"
+    hist_jar = current_path / f"jars/histogrammar_{scala}-1.0.30.jar"
 
     return (
         SparkSession.builder.master("local")