[DOC]: filesystem source example for vdb_upload is not realistic

[dagardner-nv]

How would you describe the priority of this documentation request

Medium

Please provide a link or source to the relevant docs

examples/llm/vdb_upload/README.md

Describe the problems in the documentation

The example uses --file_source "./morpheus/data/*" however these files do not represent dataframe data nor do they represent a reasonable facsimile of data fetched frrom an RSS feed.

(Optional) Propose a correction

No response

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