netlink: specs: conntrack: fix the per-CPU stats reply

ctnetlink_ct_stat_cpu_fill_info() emits CTA_STATS_INVALID but
does not emit CTA_STATS_SEARCHED. Update the attr list, and
remove the false annotation of invalid as obsolete.

Reviewed-by: Hangbin Liu <liuhangbin@kylinos.cn>
Link: https://patch.msgid.link/20260910003852.2184031-7-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/netlink/specs/conntrack.yaml

@@ -530,7 +530,7 @@ attribute-sets:
         name: invalid
         type: u32
         byte-order: big-endian
-        doc: obsolete
+        doc: packets which could not be tracked
       -
         name: ignore
         type: u32
@@ -661,8 +661,8 @@ operations:
         reply:
           value: 0x104
           attributes:
-            - searched
             - found
+            - invalid
             - insert
             - insert-failed
             - drop