Update POCO docs to add OriginalNameAttribute

[KenitoInc]

Fix https://github.com/OData/odata.net/issues/2099

[opbld30]

Docs Build status updates of commit 40921ac:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
Odata-docs/TOC.yml	:white_check_mark:Succeeded	View
Odata-docs/client/basic-crud-operations.md	:white_check_mark:Succeeded	View
Odata-docs/client/using-poco-classes.md	:white_check_mark:Succeeded	View

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[opbld33]

Docs Build status updates of commit 72297f4:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
Odata-docs/TOC.yml	:white_check_mark:Succeeded	View
Odata-docs/client/basic-crud-operations.md	:white_check_mark:Succeeded	View
Odata-docs/client/using-poco-classes.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel