fixup! Debug precompilation

Author: JamesWrigley

Diff for: .buildkite/pipeline.yml

@@ -108,10 +108,10 @@ steps:
       - JuliaCI/julia#v1:
           version: "1.8"
     env:
-      JULIA_NUM_THREADS: "1"
+      JULIA_NUM_THREADS: "2"
     agents:
       queue: "juliaecosystem"
       sandbox_capable: "true"
       os: linux
       arch: x86_64
-    command: "git clone https://github.com/JuliaParallel/DTables.jl.git ; julia -t1 -e 'using Pkg; Pkg.activate(\"DTables.jl\"); Pkg.develop(;path=\".\"); Pkg.instantiate(); Pkg.test()'"
+    command: "git clone https://github.com/JuliaParallel/DTables.jl.git ; julia -t2 -e 'using Pkg; Pkg.activate(\"DTables.jl\"); Pkg.develop(;path=\".\"); Pkg.instantiate(); Pkg.test()'"