mariadb: correct CVE_PRODUCT mapping

The default product-only mapping generates a vendor-wildcard CPE.
mariadb:mariadb is the active NVD dictionary CPE and configuration identity,
and is also used by CNA affected data for the packaged MariaDB source.
Deprecated mariadb_project records describe a separate Node.js connector.

This changes the generated product identity to an exact CPE, but the
frozen sbom-cve-check database leaves the 420-entry CVE report unchanged,
with no current CVE delta.

Signed-off-by: Devansh Patel <devanshp@cisco.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-dbs/mysql/mariadb_11.4.12.bb

@@ -1,5 +1,7 @@
 require mariadb.inc
 
+CVE_PRODUCT = "mariadb:mariadb"
+
 inherit ptest
 inherit useradd