Update bug report template with net10p7

Author: jfversluis

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -42,6 +42,7 @@ body:
       label: Version with bug
       description: In what version do you see this issue? Run `dotnet workload list` to find your version.
       options:
+        - 10.0.0-preview.7
         - 10.0.0-preview.6
         - 10.0.0-preview.5
         - 10.0.0-preview.4
@@ -133,6 +134,7 @@ body:
         - 10.0.0-preview.4
         - 10.0.0-preview.5
         - 10.0.0-preview.6
+        - 10.0.0-preview.7
     validations:
       required: true
   - type: dropdown