[MINOR][DOCS] Fix a typo in spark-standalone.md

### What changes were proposed in this pull request?

A minor typo fix to documentation.

### Why are the changes needed?

Clearer documentation for users.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Manual review.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #53285 from kepler62f/master.

Authored-by: kepler62f <blue.kepler62f@gmail.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
(cherry picked from commit a20ecc9)
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

Author: kepler62f

docs/spark-standalone.md

@@ -389,7 +389,7 @@ SPARK_MASTER_OPTS supports the following system properties:
   <td><code>spark.dead.worker.persistence</code></td>
   <td>15</td>
   <td>
-    Number of iterations to keep the deae worker information in UI. By default, the dead worker is visible for (15 + 1) * <code>spark.worker.timeout</code> since its last heartbeat.
+    Number of iterations to keep the dead worker information in UI. By default, the dead worker is visible for (15 + 1) * <code>spark.worker.timeout</code> since its last heartbeat.
   </td>
   <td>0.8.0</td>
 </tr>