Update bug_report.yml

Author: hathach

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -52,7 +52,7 @@ body:
 
   - type: textarea
     attributes:
-      label: Sketch
+      label: Sketch (attached file)
       placeholder: |
         e.g examples/MassStorage/msc_ramdisk.
         If it is custom sketch, please provide it as **ATTACHED** files or link to it.