libssh: correct CVE_PRODUCT mapping

The default product-only mapping generates a vendor-wildcard CPE.
libssh:libssh is the active NVD dictionary CPE and configuration identity
for the packaged libssh source.

This changes the generated product identity to an exact CPE, but the
frozen sbom-cve-check database leaves the 48-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-support/libssh/libssh_0.11.4.bb

@@ -15,6 +15,7 @@ SRC_URI:append:toolchain-clang = " file://0001-CompilerChecks.cmake-drop-Wunused
 
 SRCREV = "ca9c055d7c78ce357346ac7c2b14047568d47aa1"
 
+CVE_PRODUCT = "libssh:libssh"
 
 inherit cmake ptest