chore: remove "Preview" from issue template (#13807)

remove "Preview" from template

Co-authored-by: ashika112 <[email protected]>

Author: chrisbonifacio

.github/ISSUE_TEMPLATE/1.bug_report.yaml

@@ -126,7 +126,7 @@ body:
       multiple: false
       options:
         - Amplify CLI
-        - Amplify Gen 2 (Preview)
+        - Amplify Gen 2
         - CDK
         - Other
   - type: textarea