cpe:/a:libexpat_project:libexpat is the correct CPE ID for expat:
https://nvd.nist.gov/products/cpe/search/results?keyword=cpe:2.3🅰️libexpat:libexpat
Fixes: c61a239514
(add PKG_CPE_ID ids to package and tools)
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15291
Signed-off-by: Robert Marko <robimarko@gmail.com>