Benchmark: reduce alert threshold to 120%

Author: cknitt

.github/workflows/ci.yml

@@ -346,7 +346,7 @@ jobs:
           output-file-path: tests/benchmark-output.json
           external-data-json-path: ./tests/benchmark-cache/benchmark-data.json
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          alert-threshold: "150%"
+          alert-threshold: "120%"
           comment-always: true
           comment-on-alert: true
           summary-always: true