Update bug-report.yaml for 1.5-preview1 (#4172)

Author: duncanmacmichael

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -36,6 +36,7 @@ body:
       description: Specify the version of Windows App SDK (or Project Reunion) you're using.
       options:
         - "Windows App SDK 1.4.4: 1.4.231219000"
+        - "Windows App SDK 1.5 Preview 1: 1.5.240205001-preview1"
         - "Windows App SDK 1.5 Experimental 2: 1.5.240124002-experimental2"
   - type: dropdown
     attributes: