Fix missing close-parens for In filter's toString

Otherwise the open parentheses isn't closed in query plan descriptions of batch scans.

    PushedFilters: [In(COL_A, [1,2,4,6,10,16,219,815], IsNotNull(COL_B), ...

Author: Andrew Ash <andrew@andrewash.com>

Closes #16558 from ash211/patch-9.

(cherry picked from commit b040cef2)
Signed-off-by: Reynold Xin <rxin@databricks.com>

sql/core/src/main/scala/org/apache/spark/sql/sources/filters.scala

@@ -130,7 +130,7 @@ case class In(attribute: String, values: Array[Any]) extends Filter {
     case _ => false
   }
   override def toString: String = {
-    s"In($attribute, [${values.mkString(",")}]"
+    s"In($attribute, [${values.mkString(",")}])"
   }
 
   override def references: Array[String] = Array(attribute) ++ values.flatMap(findReferences)