Update bug-report.yaml for 1.8.1 (#5859)

Author: codendone

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -36,7 +36,7 @@ body:
       label: NuGet package version
       description: Specify the version of Windows App SDK (or Project Reunion) you're using.
       options:
-        - "Windows App SDK 1.8.0: 1.8.250907003"
+        - "Windows App SDK 1.8.1: 1.8.250916003"
         - "Windows App SDK 1.8 Preview 1: 1.8.250814004-preview1"
         - "Windows App SDK 1.8 Experimental 4: 1.8.250702007-experimental4"
   - type: dropdown