chore(ci): Choose 10% as threshold.

20% was chosen due to variability of the results on unrelated changes.

After discussion in lp-sync, 20% won't get us to move forward and entice to fix the problems. So instead choose a closer threshold to 10%.

Author: bric3

.gitlab/benchmarks/bp-runner.fail-on-regression.yml

@@ -4,4 +4,4 @@ experiments:
       - name: Regression Check
         run: fail_on_regression
         # Applies on all scenarios
-        regression_threshold: 20.0 # percents
+        regression_threshold: 10.0 # percents