Set unified release test to 8.2.0-SNAPSHOT

Author: sethmlarson

.github/workflows/unified-release.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        stack_version: ['8.1.0-SNAPSHOT']
+        stack_version: ['8.2.0-SNAPSHOT']
 
     steps:
       - name: Checkout