Update IntegrationTest.yml (#109)

Author: yebai

.github/workflows/IntegrationTest.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         package:
-          - {user: TuringLang, repo: AdvancedPS.jl}
+          - {user: TuringLang, repo: AdvancedPS.jl, ref: releases}
           - {user: TuringLang, repo: Turing.jl, ref: hg/new-libtask2}
 
     steps: