Updated assemble.sh to use Drupal version for project SHA + PHP 8.4 in CI.

[AlexSkrypnyk]

#230

Part 1 of PHP 8.4 readiness. Still waiting for CircleCI's PHP 8.4 images to be added. A followup PR will be required for CircleCI config.

[github-actions]

🚀 Deployed on https://673e4b3bb16aa56694763d3c--drupal-extension-scaffold-docs.netlify.app

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 8 lines in your changes missing coverage. Please review.

Project coverage is 78.40%. Comparing base (86d96b0) to head (dbac46c).
Report is 3 commits behind head on 1.x.

Files with missing lines	Patch %	Lines
.devtools/assemble.sh	80.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              1.x     #227      +/-   ##
==========================================
+ Coverage   77.89%   78.40%   +0.50%     
==========================================
  Files           8        8              
  Lines         457      477      +20     
==========================================
+ Hits          356      374      +18     
- Misses        101      103       +2     

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