updates issue template to change placeholder to value (#2006)

Author: brennanMKE

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -93,7 +93,7 @@ body:
       description: >-
         Include any relevant log output under
         `~/.amplify/logs/amplify-cli-<issue-date>.log` (See: [Logs Guidance](https://github.com/aws-amplify/amplify-ios/blob/main/LogsGuidance.md))
-      placeholder: |
+      value: |
         <details>
         <summary>Log Messages</summary>