[skip ci] Do not interpret PHP version in bug_report.yml as markdown (#18492)

Author: TimWolla

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -34,6 +34,7 @@ body:
         Copyright (c) The PHP Group
         Zend Engine v4.3.19, Copyright (c) Zend Technologies
             with Zend OPcache v8.3.19, Copyright (c), by Zend Technologies
+      render: plain
     validations:
       required: true
   - type: input