建议收缩 openx 关键词，避免误匹配上海人工智能实验室域名

The DOMAIN-KEYWORD,openx,REJECT in LAZY_RULES/Shadowrocket.conf will match openxlab.org.cn and sso.openxlab.org.cn of Shanghai Artificial Intelligence Laboratory. The same keywords cause false positives in other rule sets, as reported in ACL4SSR/ACL4SSR#400. Since the current configuration includes a pre-connect rule, the focus here is on false matches after the ad segments are extracted separately or reordered, not on the failure of the original configuration. For related fixes, see ACL4SSR/ACL4SSR#419: Narrowing the broad keywords to specific ad domain name suffixes. It is recommended that this repository also consider this adjustment to avoid false positives on the above domains when the segments are reused. Thank you!