Fix typo: dropdowm --> dropdown

Author: paulbalandan

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -11,7 +11,7 @@ body:
         ensure that there are no existing issues, whether still open or closed, related
         to your report. If there is, your report will be closed promptly.
 
-  - type: dropdowm
+  - type: dropdown
     id: php-version
     attributes:
       label: PHP Version