cve_policy: add link to OpenSSF vulnerability disclosure work

Add a link to newly released OpenSSF Vulnerability Disclosure WG guide
to disclosure for OSS projects.

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>

security/cve_policy.rst

@@ -248,6 +248,8 @@ Acknowledgements
 
 This process was inspired by the `OSS vulnerability guide
 <https://github.com/google/oss-vulnerability-guide/blob/main/guide.md>`__,
-`OpenSSF vulnerability-disclosures WG
+the `OpenSSF Vulnerability Disclosure WG guide to disclosure for OSS projects
+<https://github.com/ossf/oss-vulnerability-guide/blob/main/guide.md>`__,
+other work from the `OpenSSF vulnerability-disclosures WG
 <https://github.com/ossf/wg-vulnerability-disclosures>`__,
 `Zephyr project security policy <https://www.zephyrproject.org/security/>`__.