resolved: fix DNSSEC missing-key error

Skip unsupport/invalid `DS` and `DNSKEY` combinations during verification.

Fixes: #12545

src/resolve/resolved-dns-dnssec.c

@@ -1470,7 +1470,7 @@ int dnssec_verify_dnskey_by_ds_search(DnsResourceRecord *dnskey, DnsAnswer *vali
 
                 r = dnssec_verify_dnskey_by_ds(dnskey, ds, false);
                 if (IN_SET(r, -EKEYREJECTED, -EOPNOTSUPP))
-                        return 0; /* The DNSKEY is revoked or otherwise invalid, or we don't support the digest algorithm */
+                        continue; /* The DNSKEY is revoked or otherwise invalid, or we don't support the digest algorithm */
                 if (r < 0)
                         return r;
                 if (r > 0)