Update Background-Jobs-Hangfire.md

[sephit]

Changing OnApplicationInitialization to OnPostApplicationInitialization to fix the IsAuthenticated=false issue if it's added in a module Based on this https://support.abp.io/QA/Questions/1769/Control-access-to-Hangfire-dashboard-with-abp-permission#answer-c9354699-19b1-ecd6-db66-39fe8f8afc6e

[realLiangshiwei]

Hi,

This documentation assumes it's in the application template, not a separate module, Can you add a section to explain? Thanks.

[stale[bot]]

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