feat: update to Bot API 6.8

[KnorpelSenf]

https://core.telegram.org/bots/api#august-18-2023

[codecov]

Codecov Report

Patch coverage: 11.76% and project coverage change: -0.12% ⚠️

Comparison is base (8222180) 46.55% compared to head (a84e0ab) 46.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #476      +/-   ##
==========================================
- Coverage   46.55%   46.44%   -0.12%     
==========================================
  Files          19       19              
  Lines        5595     5611      +16     
  Branches      222      222              
==========================================
+ Hits         2605     2606       +1     
- Misses       2988     3003      +15     
  Partials        2        2              

Files Changed	Coverage Δ
src/context.ts	23.95% <0.00%> (-0.14%)	⬇️
src/core/api.ts	4.45% <0.00%> (-0.03%)	⬇️
src/filter.ts	91.11% <100.00%> (+0.02%)	⬆️
src/types.deno.ts	94.68% <100.00%> (ø)

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