Add N/A note

Author: sboldyreva

docs/els-for-runtimes-and-libraries/python-libraries/README.md

@@ -164,6 +164,8 @@ Fixes for the following vulnerabilities are available in ELS for Python Librarie
 | CVE-2025-27516      | Medium   | jinja2	      | 2.11.3             | 2.11.3.post2+tuxcare |
 | CVE-2025-47273      | High     | setuptools   | 75.8.0             | 75.8.0.post1+tuxcare |
 
+**N/A (Not Available)** mean that the National Vulnerability Database (NVD) has registered this CVE, but an official CVSS severity score has not yet been assigned.
+
 </details>
 
 If you are interested in the TuxCare Endless Lifecycle Support, contact [[email protected]](mailto:[email protected]).