How to update checbox in custom application(made using app composer) in SaaS using REST API?

Summary:

Content (required):

In the custom application, I need to update a checkbox value from 'N' to 'Y'. But my current API is supporting only POST operation but not patch.

current API: /fscmRestApi/resources/latest/ASBNDETAILS_c

payload:

{

  "RecordName" : "TESTDUTY7-BOE",

  "DUTYADDED_c":"Y" //checkbox field which is to be updated

}

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Code Snippet (add any code snippets that support your topic, if applicable):