* Replace self-closing `<hr/>` with plain `<hr>` in the `overview.html`; add `lang="en"` to avoid warning * Use Java 15 API link for JavaDocs * Use `/current` API link for all the required Spring dependencies
* Replace self-closing `<hr/>` with plain `<hr>` in the `overview.html`; add `lang="en"` to avoid warning * Use Java 15 API link for JavaDocs * Use `/current` API link for all the required Spring dependencies