[MINOR][PYTHON][TESTS] Enable test_pivot_exceed_max_values

### What changes were proposed in this pull request?
Enable `test_pivot_exceed_max_values`

### Why are the changes needed?
it was skipped due to incorrect indent

### Does this PR introduce _any_ user-facing change?
no, test-only

### How was this patch tested?
CI

### Was this patch authored or co-authored using generative AI tooling?
No

Closes #52865 from zhengruifeng/enable_pivot_test.

Authored-by: Ruifeng Zheng <ruifengz@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

Author: zhengruifeng

python/pyspark/sql/tests/test_group.py

@@ -192,9 +192,9 @@ def test_order_by_ordinal(self):
             with self.assertRaises(IndexError):
                 df.orderBy(-3)
 
-        def test_pivot_exceed_max_values(self):
-            with self.assertRaises(AnalysisException):
-                spark.range(100001).groupBy(sf.lit(1)).pivot("id").count().show()
+    def test_pivot_exceed_max_values(self):
+        with self.assertRaises(AnalysisException):
+            self.spark.range(100001).groupBy(sf.lit(1)).pivot("id").count().show()
 
 
 class GroupTests(GroupTestsMixin, ReusedSQLTestCase):