Fix JDoc and automated doc build

See https://github.com/TeamNewPipe/NewPipeExtractor/actions/runs/16660575612/job/47156509194#step:5:43

NewPipeExtractor/NewPipeExtractor/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemLockupExtractor.java:29: error: self-closing element not allowed
 * This extractor is currently (2025-07) only used to extract related video streams.<br/>

Author: TobiGr

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemLockupExtractor.java

@@ -26,7 +26,7 @@
 
 /**
  * Note:
- * This extractor is currently (2025-07) only used to extract related video streams.<br/>
+ * This extractor is currently (2025-07) only used to extract related video streams.<br>
  * The following features are currently not implemented because they have never been observed:
  * <ul>
  *     <li>Shorts</li>