Reduce thresholds for Web group tests after improvement
After the fix mentioned in gitlab-org/gitlab#353461 (comment 924513860), web group endpoints' performance returned to the original S4 level. The MR tightens up the thresholds to reflect this.
After the fix mentioned in gitlab-org/gitlab#353461 (comment 924513860), web group endpoints' performance returned to the original S4 level. The MR tightens up the thresholds to reflect this.