[SPARK-57402][SQL] Rename applyChanges local to autoCdcInto in visitCreateFlowAutoCdc

Rename the local variable holding the AutoCdcIntoCommand from applyChanges
to autoCdcInto to match the command type. No behavior change.

Co-authored-by: Isaac

Author: anew

sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala

@@ -1576,10 +1576,10 @@ class SparkSqlAstBuilder extends AstBuilder {
     val flowHeaderCtx = ctx.createPipelineFlowHeader()
     val ident = withIdentClause(flowHeaderCtx.flowName, UnresolvedIdentifier(_))
     val commentOpt = Option(flowHeaderCtx.commentSpec()).map(visitCommentSpec)
-    val applyChanges = buildAutoCdcIntoCommand(ctx.autoCdcCommand())
+    val autoCdcInto = buildAutoCdcIntoCommand(ctx.autoCdcCommand())
     CreateFlowCommand(
       name = ident,
-      flowOperation = applyChanges,
+      flowOperation = autoCdcInto,
       comment = commentOpt
     )
   }