[AURON #2047] Fix Scala 2.13 CI NoClassDefFoundError

[cxzl25]

Which issue does this PR close?

Closes #2047

Rationale for this change

  if [ 2.13 = "2.13" && "spark-3.5" != "spark-4.0" && "spark-3.5" != "spark-4.1" ]; then
    SPARK_FILE="spark-3.5.8-bin-hadoop3-scala2.13.tgz"
  else
    SPARK_FILE="spark-3.5.8-bin-hadoop3.tgz"
  fi

/home/runner/work/_temp/5e39dd44-8905-4fc9-ad30-a316cba0dc50.sh: line 2: [: missing `]'
--2026-02-27 05:16:45--  https://www.apache.org/dyn/closer.lua/spark/spark-3.5.8/spark-3.5.8-bin-hadoop3.tgz?action=download

https://github.com/apache/auron/actions/runs/22473356538/job/65096490529?pr=2040

What changes are included in this PR?

Are there any user-facing changes?

How was this patch tested?

GHA

--2026-02-27 13:27:10--  https://www.apache.org/dyn/closer.lua/spark/spark-3.5.8/spark-3.5.8-bin-hadoop3-scala2.13.tgz?action=download

[Copilot]

Pull request overview

This PR fixes a bash syntax error in the GitHub Actions workflow that was causing the Scala 2.13 CI builds to fail with a "missing ]'" error. The issue was that single brackets [ ]cannot properly handle compound conditionals with the&&` operator in bash, leading to a syntax error that prevented the correct Spark binary from being downloaded, which in turn caused the NoClassDefFoundError.

Changes:

• Fixed bash conditional syntax from single brackets [ ] to double brackets [[ ]] for compound conditions with multiple && operators

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[ShreyeshArangath]

thanks for fixing this

[yew1eb]

Thanks, LGTM!