Install open-java-format 21.0.2

The pages install 21.0.2, which openjavaformat/open-java-format
released on 2026-11-08. Made by the "Follow open-java-format releases" workflow:
https://github.com/openjavaformat/docs/actions/runs/42512905562

Author: github-actions[bot]

zensical.toml

@@ -110,7 +110,7 @@ toggle.name = "Switch to system preference"
 # plugin puts it in before the Markdown is rendered, so it lands in code blocks too. The key is not
 # extra.version: the theme reads that one as the switch for a version selector.
 [project.extra]
-ojf_version = "21.0.1"
+ojf_version = "21.0.2"
 # The Maven plugin is released from its own repository, openjavaformat/fmt-maven-plugin, with version
 # numbers of its own. follow-maven-plugin-releases.yml bumps it on each release of the plugin.
 maven_plugin_version = "2.27.0.2"