Update bug_report.md issue template (#43)

Ported from
canonical/mysql-router-k8s-operator#91

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,6 +8,7 @@ labels: bug
 <!-- Thank you for submitting a bug report! All fields are required unless marked optional. -->
 
 ## Steps to reproduce
+<!-- Please enable debug logging by running `juju model-config logging-config="<root>=INFO;unit=DEBUG"` (if possible) -->
 1. 
 
 ## Expected behavior
@@ -19,32 +20,26 @@ labels: bug
 
 ## Versions
 
-<!-- Run "lsb_release -sd" -->
+<!-- Run `lsb_release -sd` -->
 Operating system: 
 
-<!-- Run "juju version" -->
+<!-- Run `juju version` -->
 Juju CLI: 
 
-<!-- Model version from "juju status" -->
+<!-- Model version from `juju status` -->
 Juju agent: 
 
-<!-- App revision from "juju status" or (advanced) commit hash -->
+<!-- App revision from `juju status` or (advanced) commit hash -->
 mysql charm revision: 
 mysql-router charm revision: 
 
-<!-- Run "lxd version" -->
+<!-- Run `lxd version` -->
 LXD: 
 
 ## Log output
-<details>
-<summary> juju debug-log --replay </summary>
-
-<!-- Paste the full output of "juju debug-log --replay" between the triple backticks (```) -->
-```shell
-
-
-```
-</details>
+<!-- Please enable debug logging by running `juju model-config logging-config="<root>=INFO;unit=DEBUG"` (if possible) -->
+<!-- Then, run `juju debug-log --replay > log.txt` and upload "log.txt" file here -->
+Juju debug log: 
 
 <!-- (Optional) Copy the logs that are relevant to the bug & paste inside triple backticks below -->