Update rules_proto commit hash to 84ba6ec (master)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rules_proto	http_archive	digest	97d8af4 -> 84ba6ec

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[codecov-io]

Codecov Report

Merging #1849 (4d6a1dd) into master (34c88e9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1849   +/-   ##
=======================================
  Coverage   58.07%   58.07%           
=======================================
  Files          34       34           
  Lines        3754     3754           
=======================================
  Hits         2180     2180           
  Misses       1301     1301           
  Partials      273      273           

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