chore: improve bug report template with log toggle (#9248)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,11 +22,19 @@ labels: 'type:bug, status:requirements, priority-5-triage'
 <!--
 Try not to raise a bug report unless you've looked at the logs first.
 
-If you're running self-hosted, run with `--log-level=debug` or LOG_LEVEL=debug and search for whatever dependency/branch/PR that is causing the problem. If you are using the Renovate App, log into https://app.renovatebot.com/dashboard and locate the correct job log for when the problem occurred (e.g. when the PR was created).
+If you're running self-hosted, run with `LOG_LEVEL=debug` in your environment variables and search for whatever dependency/branch/PR that is causing the problem. If you are using the Renovate App, log into https://app.renovatebot.com/dashboard and locate the correct job log for when the problem occurred (e.g. when the PR was created).
 
 Paste the *relevant* logs here, not the entire thing and not just a link to the dashboard (others do not have permissions to view them).
 -->
 
+<details><summary>Click me to see logs</summary>
+
+```
+Copy/paste any log here, between the starting and ending backticks
+```
+
+</details>
+
 **Have you created a minimal reproduction repository?**
 
 Please read the [minimal reproductions documentation](https://github.com/renovatebot/renovate/blob/master/docs/development/minimal-reproductions.md) to learn how to make a good minimal reproduction repository.