fix: correct spelling error in get_healthcheck_events_module function name

[ChuanFF]

Description

This PR fixes a spelling error in the function name get_healthcheck_events_modele to get_healthcheck_events_module. The typo in the function name ("modele" instead of "module") could cause confusion and potential issues when calling this function.

Which issue(s) this PR fixes:

Fixes #

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)