DSET-4456: Use Go 1.20 and not 1.2 in CI/CD pipeline

[martin-majlis-s1]

Jira Link: https://sentinelone.atlassian.net/browse/DSET-4456

🥅 Goal

In the PR #53 I have switched Go version from 1.19 to to 1.20. But there is some GHA feature, that it treats as 1.2. This can be seen in the Dependabot PR - https://github.com/scalyr/dataset-go/actions/runs/5960922153/job/16169141080?pr=49#step:4:31 - which has failed because some tools cannot be installed with Go 1.2.

But when I check the same action in the PR #53 - it has failed - https://github.com/scalyr/dataset-go/actions/runs/5952594475/job/16144912841. I have enabled auto merge, but I haven't expected, that it will be merged, when there is some failing action.

🛠️ Solution

Fix the notation so that Go 1.20 is used instead of 1.2

🏫 Testing

Check that the pipeline succeeds.

[codecov-commenter]

Codecov Report

Merging #54 (97d1f02) into main (68a857c) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage   75.13%   75.13%           
=======================================
  Files          12       12           
  Lines        1713     1713           
=======================================
  Hits         1287     1287           
  Misses        359      359           
  Partials       67       67           

[martin-majlis-s1]

After the PR is created it takes some time before the pipelines are triggered. And based on the UI it looks that it's possible to merge it when approved even without successful GHA.