[cdc-base][hotfix] Fix SourceSplitSerializer to get totalFinishedSplitSize from recovery in 4th version

This closes #2992.

flink-cdc-connect/flink-cdc-source-connectors/flink-cdc-base/src/main/java/com/ververica/cdc/connectors/base/source/meta/split/SourceSplitSerializer.java

@@ -159,7 +159,7 @@ public abstract class SourceSplitSerializer
                     readFinishedSplitsInfo(version, in);
             Map<TableId, TableChange> tableChangeMap = readTableSchemas(version, in);
             int totalFinishedSplitSize = finishedSplitsInfo.size();
-            if (version == 3) {
+            if (version >= 3) {
                 totalFinishedSplitSize = in.readInt();
             }
             in.releaseArrays();