chore: downgrade go version to v1.18

[ishitasequeira]

Signed-off-by: ishitasequeira ishiseq29@gmail.com

Reverting go version to 1.18 as go mod download fails in MacOS with go 1.19.
Slack discussion can be found here

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[codecov]

Codecov Report

Merging #10351 (ba8cebd) into master (9b4f468) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10351   +/-   ##
=======================================
  Coverage   46.16%   46.16%           
=======================================
  Files         228      228           
  Lines       28004    28004           
=======================================
  Hits        12927    12927           
  Misses      13324    13324           
  Partials     1753     1753           

Impacted Files	Coverage Δ
util/settings/settings.go	51.36% <0.00%> (ø)

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[crenshaw-dev]

lgtm!