update-installation-script, update-centos and update-debian can't run in parallel

[Gedochao]

The following jobs all push commits to https://github.com/VirtusLab/scala-cli-packages upon release:

• update-installation-script
• update-centos
• update-debian

They shouldn't run in parallel, as otherwise they fail due to parallel write errors.

Example error log from v1.14.0 release (https://github.com/VirtusLab/scala-cli/actions/runs/25888654616/job/76165582895):

4] Trying to push on main branch
4] To key-45d2d067fd6cd3e1f1cf7588ef3946f022780ced97a778f790fe0d6cec431837.github.com:Virtuslab/scala-cli-packages.git
4]  ! [rejected]        main -> main (fetch first)
4] error: failed to push some refs to 'key-45d2d067fd6cd3e1f1cf7588ef3946f022780ced97a778f790fe0d6cec431837.github.com:Virtuslab/scala-cli-packages.git'
4] hint: Updates were rejected because the remote contains work that you do not
4] hint: have locally. This is usually caused by another repository pushing to
4] hint: the same ref. If you want to integrate the remote changes, use
4] hint: 'git pull' before pushing again.
4] hint: See the 'Note about fast-forwards' in 'git push --help' for details.
4/4, 1 FAILED] /home/runner/work/scala-cli/scala-cli/millw ci.updateDebianPackages 272s
Error: 4] [error] ci.updateDebianPackages
os.SubprocessException: Result of git…: 1

  os.SubprocessException$.apply(Model.scala:211)
  os.proc.call(ProcessOps.scala:232)
  build_.package_.build_$package_$$commitChanges(build.mill:1597)
  build_.package_$ci$.updateDebianPackages$$anonfun$1(build.mill:1935)
  mill.api.Task$Named.evaluate(Task.scala:443)
  mill.api.Task$Named.evaluate$(Task.scala:428)
  mill.api.Task$Command.evaluate(Task.scala:525)

How much have your relied on LLM-based tools in this contribution?

Moderately, Cursor + Claude

How was the solution tested?

wasn't, would have to run another release