apacheGH-42224: [Java] Fix Typo in TestAceroSubstraitConsumer Test Method (apache#42225)

### Rationale for this change

Fixes a typo causing a `NullPointerException` in the test method

### What changes are included in this PR?

- Updating typo to fix Unit Test

### Are these changes tested?

Yes

### Are there any user-facing changes?

No.

* GitHub Issue: apache#42224

Authored-by: Hyunseok Seo <[email protected]>
Signed-off-by: David Li <[email protected]>

Author: llama90

java/dataset/src/test/java/org/apache/arrow/dataset/substrait/TestAceroSubstraitConsumer.java

@@ -632,7 +632,7 @@ public void testRunExtendedExpressionsProjectAndFilter() throws Exception {
         assertThat(sumVector.getValueIterable(), IsIterableContainingInOrder.contains(21, 3, 13));
         final ValueIterableVector<Text> nameVector =
             (ValueIterableVector<Text>)
-                reader.getVectorSchemaRoot().getVector("conccat_column_a_and_b");
+                reader.getVectorSchemaRoot().getVector("concat_column_a_and_b");
         assertThat(
             nameVector.getValueIterable(),
             IsIterableContainingInOrder.contains(