[HUDI-6441][DOCS] Passing custom Headers with Hudi Callback URL

[wombatu-kun]

Change Logs

Fix documentation in addition to already merged PR https://github.com/apache/hudi/pull/10970

Impact

none

Risk level (write none, low medium or high below)

none

Documentation Update

Added config param to Http Endpoints info.

• The config description must be updated if new configs are added or the default value of the configs are changed
• Any new feature or user-facing change requires updating the Hudi website. Please create a Jira ticket, attach the ticket number here and follow the instruction to make changes to the website.

Contributor's checklist

• [ ] Read through contributor's guide
• [ ] Change Logs and Impact were stated clearly
• [ ] Adequate tests were added if applicable
• [ ] CI passed