Added support of PATCH method

[ziflex]

This pull request includes changes to add support for the PATCH HTTP method in the HTTP data source. The most important changes include updating the documentation, modifying the schema to include the PATCH method, and adding a test for the new method.

Documentation Updates:

• Updated the HTTP method list in the documentation to include PATCH.

Code Updates:

• Modified the schema definition to support the PATCH method in the HTTP data source.

Testing:

• Added a new test case to verify the functionality of the PATCH method in the HTTP data source.

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[ziflex]

I know it's not part of the RFC7231 but it's really needed. (Also, I think PUT needs to be added later on too).