Fix M83 try pool (for real, hopefully).

Bug: 1067999
Change-Id: Ie400d1b600295f3c36fcd422ab84eaf5e51caec0
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2137732
Commit-Queue: Aaron Gable <agable@chromium.org>
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756767}

infra/config/versioned/milestones/m83/buckets/try.star

@@ -4,7 +4,7 @@ load('//lib/try.star', 'try_')
 # need to be changed when making a new milestone
 load('../vars.star', 'vars')
 
-defaults.pool.set('lui.chromium.try')
+defaults.pool.set('luci.chromium.try')
 
 luci.bucket(
     name = vars.try_bucket,