Update logging.mdx

[Cameronjmayfield]

Simple typo fix from reqwest_logging to request_logging

[apollo-cla]

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[Geal]

reqwest is a rust http client so this line was about log filtering for that particular library so it is not a typo. But that library is not used anymore for subgraph requests though, so you could remove that entire line instead 😄

[Cameronjmayfield]

Thanks @Geal! I've updated the MR.

[Geal]

Thanks!