[DOCS] Update release notes for 1.6.1-rc2 (#1556)

docs/setup/release-notes.md

@@ -167,6 +167,8 @@ This release is a maintenance release that includes bug fixes and minor improvem
 </li>
 <li>[<a href='https://issues.apache.org/jira/browse/SEDONA-643'>SEDONA-643</a>] -         Fix Flink constructor functions signatures
 </li>
+<li>[<a href='https://issues.apache.org/jira/browse/SEDONA-645'>SEDONA-645</a>] -         Add ST_RotateX
+</li>
 </ul>
 
 ### Improvement

mkdocs.yml

@@ -163,8 +163,8 @@ extra:
     current_geotools: 1.6.0-28.2
   sedona_create_release:
     current_version: 1.6.1
-    current_git_tag: sedona-1.6.1-rc1
-    current_rc: 1.6.1-rc1
+    current_git_tag: sedona-1.6.1-rc2
+    current_rc: 1.6.1-rc2
     current_snapshot: 1.6.1-SNAPSHOT
     next_version: 1.7.0
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