Fix: add ref key

Author: skyleaworlder

.github/workflows/BenchmarkTrigger.yml

@@ -37,6 +37,7 @@ jobs:
         uses: benc-uk/workflow-dispatch@v1
         with:
           repo: Eternal-Night-Archer/FluxMLBenchmarks.jl
+          ref: main
           workflow: Benchmark.yml
           token: ${{ steps.get-app-token.outputs.token }}
           inputs: '{ "repo": "${{ env.REPOSITORY }}", "pr_id": ${{ env.PR_ID }}, "target_url": "${{ env.TARGET_URL }}", "baseline_url": "${{ env.BASELINE_URL }}" }'