Run IntegrationTest on 1.12-nightly

Author: serenity4

.github/workflows/IntegrationTest.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        julia-version: ['1']
+        julia-version: ['1.12-nightly']
         os: [ubuntu-latest]
         package:
           - {user: timholy, repo: SnoopCompile.jl}