Align default tagging

[jotak]

cc @OlivierCazade same PR than here netobserv/network-observability-operator#769

• I'm aligning the default tag to what we do also in the other repos, using main by default

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.35%. Comparing base (df4bbeb) to head (e0f1043).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #713      +/-   ##
==========================================
- Coverage   65.38%   65.35%   -0.03%     
==========================================
  Files         108      108              
  Lines        6960     6960              
==========================================
- Hits         4551     4549       -2     
- Misses       2099     2100       +1     
- Partials      310      311       +1     

Flag	Coverage Δ
unittests	65.35% <ø> (-0.03%)	⬇️

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see 1 file with indirect coverage changes

[jotak]

/lgtm
/approve

[openshift-ci]

@jotak: you cannot LGTM your own PR.

In response to this:

/lgtm
/approve

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[openshift-ci]

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