Lower scheduled jobs frequency

[christophebedard]

Tests take sometimes more than an hour to complete, so hourly scheduled jobs gets backed up. This gets even worse when dependabot opens a bunch of PRs every day.

This has led to PR tests being queued for 10h+.

I am proposing to reduce the frequency to twice per day, but anything less frequent than hourly (every 2-4h) would help.

[emersonknapp]

This is fine with me, it really doesn't need to run every hour

[codecov]

Codecov Report

Merging #593 (69ef669) into master (2466232) will decrease coverage by 0.90%.
The diff coverage is n/a.

❗ Current head 69ef669 differs from pull request most recent head da0f8ca. Consider uploading reports for the commit da0f8ca to get more accurate results

@@            Coverage Diff             @@
##           master     #593      +/-   ##
==========================================
- Coverage   38.63%   37.72%   -0.91%     
==========================================
  Files           2        2              
  Lines         220      220              
  Branches       41       41              
==========================================
- Hits           85       83       -2     
- Misses        135      137       +2     

Impacted Files	Coverage Δ
src/action-ros-ci.ts	28.27% <0.00%> (-1.05%)	⬇️

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