fix: typos

Author: shalshcode08

src/content/java/oops.html

@@ -2018,5 +2018,5 @@ <h2 id="cheatsheet"><span class="num">15.</span> One-screen cheat sheet</h2>
 </div>
 
 <footer class="doc-footer">
-  Last reviewed · June 2026 · part of knowledge-base
+  Last reviewed · June 2026 · part of <strong>knowledge-base</strong>
 </footer>