Wrong fields used in the filter and aggregation

[liu-xiao-guo]

For the notebook at https://github.com/elastic/elasticsearch-labs/blob/main/supporting-blog-content/vector-search-implementation-guide-api/vector_search_implementation_guide_api.ipynb, "my_metadata" is a text field, and it should not be used in the term filter, and it is the same for the aggregation. The correct one should be "my_metadata.keyword".

[miguelgrinberg]

@jeffvestal Will you be looking at this? The corresponding blog article needs to be fixed as well, it appears.

[serenachou]

@jeffvestal just a ping on this one