typo in OllamaEncoder docstring model_name -> name

[t556]

In 'OllamaEncoder.init' the docstring refers to 'model_name' instead of the actual parameter 'name'. This could be confusing. I propose we update the docstring to 'name' to reflect the actual parameter

[jamescalam]

hey @t556 I saw you closed the PR, why?

[t556]

My mistake, first time working with forks. I deleted it by mistake.