[Feedback]: Highlight mandatory parameters required in definition of user defined actions

[Joyfred]

Is it easy to find the information you need?

Yes

Are the instructions clear?

Yes

How could we improve the Timescale documentation site?

While defining user defined actions (jobs), based on this page
users tend to create functions like:

CREATE FUNCTION func()

instead of

CREATE FUNCTION func(job_id INT DEFAULT NULL, config JSONB DEFAULT NULL)

which leads to errors. It'd be great if you can somehow highlight that these arguments are mandatory to added, while defining functions for jobs