Add ticket reference for false positive in clippy

[alamb]

1. Add a reference to non_send_fields_in_send_ty seems to be misguided rust-lang/rust-clippy#8045 explaining why that lint is disabled

Found by @jhorstmann

[codecov-commenter]

Codecov Report

Merging #1181 (90fb1d1) into master (66b84f3) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1181   +/-   ##
=======================================
  Coverage   82.66%   82.66%           
=======================================
  Files         173      173           
  Lines       50902    50902           
=======================================
+ Hits        42077    42078    +1     
+ Misses       8825     8824    -1     

Impacted Files	Coverage Δ
arrow/src/buffer/immutable.rs	98.92% <ø> (ø)
arrow/src/datatypes/datatype.rs	66.38% <0.00%> (-0.43%)	⬇️
arrow/src/array/transform/mod.rs	85.69% <0.00%> (+0.13%)	⬆️
parquet/src/encodings/encoding.rs	93.71% <0.00%> (+0.19%)	⬆️

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