chore: update healcheck dependency

[AlinsRan]

Description

This dependency fixes the following issues:

fix: properly log line numbers by using tail calls Kong/lua-resty-healthcheck#29
fix: when not providing a hostname, use IP Kong/lua-resty-healthcheck#48
fix: exit early when reloading during a probe Kong/lua-resty-healthcheck#47
fix: prevent target-list from being nil, due to async behaviour Kong/lua-resty-healthcheck#44
fix: replace timer and node-wide locks with resty-timer, to prevent interval skips Kong/lua-resty-healthcheck#59
fix: do not run out of timers during init/init_worker when adding a vast amount of targets Kong/lua-resty-healthcheck#57
fix: do not call on the module table, but use a method for locks. Also in Kong/lua-resty-healthcheck#57

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)