Update google.golang.org/genproto commit hash to 8081c04 (master)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
google.golang.org/genproto	require	digest	fc48d45 -> 8081c04

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[codecov-io]

Codecov Report

Merging #1920 (b6a08b8) into master (f08642b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1920   +/-   ##
=======================================
  Coverage   57.96%   57.96%           
=======================================
  Files          34       34           
  Lines        3771     3771           
=======================================
  Hits         2186     2186           
  Misses       1311     1311           
  Partials      274      274           

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