[KYUUBI #6432] Mention support for Spark 4.0 in docs

`master` and `branch-1.9` already added basic support for Spark 4.0.0-preivew1.

- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

Review

---

- [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html)

**Be nice. Be informative.**

Closes #6432 from pan3793/docs-4.0.

Closes #6432

73177aa [Cheng Pan] Mention support for Spark 4.0 in docs

Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
(cherry picked from commit 0231731)
Signed-off-by: Cheng Pan <chengpan@apache.org>

docs/quick_start/quick_start.rst

@@ -43,7 +43,7 @@ pre-installed and the ``JAVA_HOME`` is correctly set to each component.
   **Kyuubi**       Gateway      \ |release| \        - Kyuubi Server
                    Engine lib                        - Kyuubi Engine
                    Beeline                           - Kyuubi Hive Beeline
-  **Spark**        Engine       3.1 to 3.5           A Spark distribution
+  **Spark**        Engine       3.1 to 3.5, 4.0      A Spark distribution
   **Flink**        Engine       1.16 to 1.19         A Flink distribution
   **Trino**        Engine       N/A                  A Trino cluster allows to access via trino-client v411
   **Doris**        Engine       N/A                  A Doris cluster