Update issue template placeholder (#3785)

Update to .NET 10.

Author: martincostello

.github/ISSUE_TEMPLATE/10_bug_report.yml

@@ -57,7 +57,7 @@ body:
     label: .NET Version
     description: |
       Run `dotnet --version` to get the .NET SDK version you're using.
-      Alternatively, which target framework(s) (e.g. `net8.0`) does the project you're using Swashbuckle.AspNetCore in target?
+      Alternatively, which target framework(s) (e.g. `net10.0`) does the project you're using Swashbuckle.AspNetCore in target?
   validations:
     required: false
 - type: textarea