cpe:/a:netfilter:iptables is the correct CPE ID for iptables:
https://nvd.nist.gov/products/cpe/search/results?keyword=cpe:2.3🅰️netfilter:iptables
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/15297
Signed-off-by: Robert Marko <robimarko@gmail.com>