Update bug-report.yaml (#5722)

Author: RDMacLachlan

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -37,7 +37,7 @@ body:
       description: Specify the version of Windows App SDK (or Project Reunion) you're using.
       options:
         - "Windows App SDK 1.7.3: 1.7.250606001"
-        - "Windows App SDK 1.7 Preview 1: 1.7.250208002-preview1"
+        - "Windows App SDK 1.8 Preview 1: 1.8.250814004-preview1"
         - "Windows App SDK 1.8 Experimental 4: 1.8.250702007-experimental4"
   - type: dropdown
     attributes: