Amend HBASE-26003 Update downloads.xml for release 2.4.4

Fix typo (informational only nit)

Signed-off-by: Andrew Purtell <apurtell@apache.org>

Author: apurtell

src/site/xdoc/downloads.xml

@@ -51,7 +51,7 @@ under the License.
         2021/06/14
       </td>
       <td style="test-align: left">
-        <a href="https://downloads.apache.org/hbase/2.4.4/api_compare_2.4.3_to_2.4.4RC0.html">2.4.4 vs 2.4.2</a>
+        <a href="https://downloads.apache.org/hbase/2.4.4/api_compare_2.4.3_to_2.4.4RC0.html">2.4.4 vs 2.4.3</a>
       </td>
       <td style="test-align: left">
         <a href="https://downloads.apache.org/hbase/2.4.4/CHANGES.md">Changes</a>