chore(ietf-wimse): update beautifulsoup4 requirement

Updates the requirements on [beautifulsoup4](https://www.crummy.com/software/BeautifulSoup/bs4/) to permit the latest version.

---
updated-dependencies:
- dependency-name: beautifulsoup4
  dependency-version: 4.15.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tracks/ietf-wimse/requirements.txt

@@ -1,3 +1,3 @@
-beautifulsoup4>=4.14.3
+beautifulsoup4>=4.15.0
 PyYAML>=6.0.3
 requests>=2.34.2