lts-v2.10: use mbedtls v3.6.3

Change-Id: Ie5bea68d8007a1c2dcd55e617f6f46b26faaedd3
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/tf-a-lts2.10-gerrit-tforg-l2.yaml b/tf-a-lts2.10-gerrit-tforg-l2.yaml
index 1053fff..9322051 100644
--- a/tf-a-lts2.10-gerrit-tforg-l2.yaml
+++ b/tf-a-lts2.10-gerrit-tforg-l2.yaml
@@ -58,7 +58,7 @@
               tf-a-job-configs refspec to use. The master branch is used by default.
         - string:
             name: MBEDTLS_URL
-            default: 'https://github.com/Mbed-TLS/mbedtls/archive/mbedtls-3.6.2.tar.gz'
+            default: 'https://github.com/Mbed-TLS/mbedtls/archive/mbedtls-3.6.3.tar.gz'
         - string:
             name: LAVA_RETRIES
             default: 2