Set higher priority for kotlin builder

This will run rarely and run fast

Change-Id: Iafd779c8ab244838aad6e9c6961635c865eb6eba
diff --git a/infra/config/global/cr-buildbucket.cfg b/infra/config/global/cr-buildbucket.cfg
index a4e4210..65521a9 100644
--- a/infra/config/global/cr-buildbucket.cfg
+++ b/infra/config/global/cr-buildbucket.cfg
@@ -425,6 +425,7 @@
       name: "kotlin-builder"
       mixins: "linux"
       mixins: "normal"
+      priority: 27
       recipe {
         properties_j: "test_options:[\"--not_used\"]"
         properties: "test_wrapper:google-scripts/build.py"