ci: Add concurrency to cancel previous workflow runs

[dplewis]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Adds concurrency to minimise the amount of outdated workflows that are run.

Closes: n/a

Approach

n/a

[parse-github-assistant]

Thanks for opening this pull request!

• ❌ Please link an issue that describes the reason for this pull request, otherwise your pull request will be closed. Make sure to write it as Closes: #123 in the PR description, so I can recognize it.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +5.25 🎉

Comparison is base (154da34) 77.81% compared to head (08e7edb) 83.06%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1732      +/-   ##
==========================================
+ Coverage   77.81%   83.06%   +5.25%     
==========================================
  Files         299      276      -23     
  Lines       36150    33592    -2558     
==========================================
- Hits        28129    27904     -225     
+ Misses       8021     5688    -2333     

see 68 files with indirect coverage changes

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[mtrezza]

Looks good!

[parseplatformorg]

🎉 This change has been released in version 2.4.0