[SPARK-53750] Use 4.1.0-preview2 instead of RC1

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

This PR aims to use `4.1.0-preview2` instead of `RC1`.

### Why are the changes needed?

Apache Spark 4.1.0-preview12is available in `release` directory from Today.

- https://dist.apache.org/repos/dist/release/spark/spark-4.1.0-preview2/

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

To make CI works against the updated links.

### How was this patch tested?

Pass the CIs.

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

No.

Closes #246 from dongjoon-hyun/SPARK-53750.

Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: dongjoon-hyun

.github/workflows/build_and_test.yml

@@ -153,7 +153,7 @@ jobs:
       run: swift test --filter NOTHING -c release
     - name: Test
       run: |
-        curl -LO https://dist.apache.org/repos/dist/dev/spark/v4.1.0-preview2-rc1-bin/spark-4.1.0-preview2-bin-hadoop3.tgz
+        curl -LO https://www.apache.org/dyn/closer.lua/spark/spark-4.1.0-preview2/spark-4.1.0-preview2-bin-hadoop3.tgz?action=download
         tar xvfz spark-4.1.0-preview2-bin-hadoop3.tgz && rm spark-4.1.0-preview2-bin-hadoop3.tgz
         mv spark-4.1.0-preview2-bin-hadoop3 /tmp/spark
         cd /tmp/spark/sbin
@@ -198,7 +198,7 @@ jobs:
       run: swift test --filter NOTHING -c release
     - name: Test
       run: |
-        curl -LO https://dist.apache.org/repos/dist/dev/spark/v4.1.0-preview2-rc1-bin/spark-4.1.0-preview2-bin-hadoop3.tgz
+        curl -LO https://www.apache.org/dyn/closer.lua/spark/spark-4.1.0-preview2/spark-4.1.0-preview2-bin-hadoop3.tgz?action=download
         tar xvfz spark-4.1.0-preview2-bin-hadoop3.tgz && rm spark-4.1.0-preview2-bin-hadoop3.tgz
         mv spark-4.1.0-preview2-bin-hadoop3 /tmp/spark
         cd /tmp/spark/sbin