Upgrade to 2023-09-13

[fasterthanlime]

This is currently blocked on rust-lang/rust#114858

Which is apparently solved by rust-lang/rust#115215

But maybe not completely? rust-lang/rust#115215 (comment)

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.11% 🎉

Comparison is base (d25ce7a) 88.51% compared to head (a97f63e) 88.62%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   88.51%   88.62%   +0.11%     
==========================================
  Files          33       33              
  Lines        5432     5432              
==========================================
+ Hits         4808     4814       +6     
+ Misses        624      618       -6     

Files Changed	Coverage Δ
crates/hring-hpack/src/huffman.rs	97.70% <100.00%> (ø)

... and 5 files with indirect coverage changes

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