docs(arm): update TBBR CoT dtsi file name in doc

Change-Id: I31ebee7574f5133aadbf2767377fd74a21775ce5
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
diff --git a/docs/security_advisories/security-advisory-tfv-10.rst b/docs/security_advisories/security-advisory-tfv-10.rst
index 91dba07..f53bae1 100644
--- a/docs/security_advisories/security-advisory-tfv-10.rst
+++ b/docs/security_advisories/security-advisory-tfv-10.rst
@@ -98,7 +98,7 @@
 ``drivers/auth/``) require that the certificate's signature has already been
 validated prior to calling ``get_ext()``, or any function that calls ``get_ext()``.
 Platforms taking their chain of trust from a dynamic configuration file (such as
-``fdts/cot_descriptors.dtsi``) are also safe, as signature verification will
+``fdts/tbbr_cot_descriptors.dtsi``) are also safe, as signature verification will
 always be done prior to any calls to ``get_ext()`` or ``auth_nvctr()`` in this
 case, no matter the order of the properties in the file.  Therefore, it is not
 possible to exploit this vulnerability pre-authentication in upstream TF-A.