fix(deps): update rust crate tracing to v0.1.40

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
tracing (source)	dependencies	patch	0.1.39 -> 0.1.40

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Release Notes

tokio-rs/tracing (tracing)

v0.1.40: tracing 0.1.40

Compare Source

This release fixes a potential stack use-after-free in the
Instrument::into_inner method. Only uses of this method are affected by this
bug.

Fixed

• Use mem::ManuallyDrop instead of mem::forget in Instrument::into_inner
  (#​2765)

Thanks to @​cramertj and @​manishearth for finding and fixing this issue!

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