Change the render language to shell

Author: pradyunsg

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -67,7 +67,7 @@ body:
         the line containing the command with `$ `. Please also ensure that
         the "How to reproduce" section contains matching instructions for
         reproducing this.
-      render: sh-session
+      render: shell
 
   - type: checkboxes
     attributes: