upgrade xk6-dashboard to v0.7.3

[szkiba]

What?

Upgrade xk6-dashboard dependency to v0.7.3

Release Notes v0.7.3

[WARNING!]
Attention, this is just a placeholder PR, it currently contains version v0.7.3-alpha.1. As soon as the final v0.7.3 version is ready, the PR will be updated.

Checklist

• [x ] I have performed a self-review of my code.
• I have added tests for my changes.
• I have run linter locally (make lint) and all checks pass.
• I have run tests locally (make tests) and all tests pass.
• I have commented on my code, particularly in hard-to-understand areas.

[codebien]

Attention, this is just a placeholder PR

@szkiba Does it mean we don't have to review it? If yes, can you convert it into a draft PR, please?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.57%. Comparing base (b5a6feb) to head (56ef773).

❗ Current head 56ef773 differs from pull request most recent head 158382f. Consider uploading reports for the commit 158382f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3614      +/-   ##
==========================================
+ Coverage   73.55%   73.57%   +0.01%     
==========================================
  Files         277      277              
  Lines       20228    20228              
==========================================
+ Hits        14879    14883       +4     
+ Misses       4401     4397       -4     
  Partials      948      948              

Flag	Coverage Δ
macos	?
ubuntu	73.53% <ø> (+0.05%)	⬆️
windows	73.42% <ø> (+0.01%)	⬆️

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[szkiba]

Attention, this is just a placeholder PR

@szkiba Does it mean we don't have to review it? If yes, can you convert it into a draft PR, please?

@codebien done

it probably doesn't require a big review, but I wouldn't say it doesn't require a review, so converted to draft