Bump theme version to 1.6.1

Updated the version in theme.yaml from 1.6.0 to 1.6.1 to reflect the latest release.

Author: ruibaby

theme.yaml

@@ -14,7 +14,7 @@ spec:
   issues: https://github.com/lxware-dev/theme-ocean/issues
   settingName: "theme-ocean-setting"
   configMapName: "theme-ocean-configMap"
-  version: 1.6.0
+  version: 1.6.1
   requires: ">=2.21.0"
   license:
     - name: "GNU General Public License v3.0"