Update bug_report.yml

Added request for bootloader config plus links to various sections of the docs for diagnostics

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -15,7 +15,9 @@ body:
   attributes:
     label: Describe the bug
     description: |
-      Add a clear and concise description of what you think the bug is.
+      Add a clear and concise description of what you think the bug is. 
+      * Attach a photo of the bootloader [diagnostics](/var/lib/raspberrypi/bootloader/backup) if this shows an error.
+      * If the system is failing to boot then please check if the green activity LED is displaying an [error pattern](https://www.raspberrypi.com/documentation/computers/configuration.html#led-warning-flash-codes).
   validations:
     required: true
 
@@ -41,13 +43,23 @@ body:
       - Other
   validations:
     required: true
+    
+- type: textarea
+  id: config
+  attributes:
+    label: Bootloader config
+    description: |      
+      Copy and paste the results of `rpi-eeprom-config` or `vcgencmd bootloader_config` or describe the configuration changes if the system is not booting.
+      * N.B `rpi-eeprom-update` saves a backup of the previous bootloader configuration to `/var/lib/raspberrypi/bootloader/backup` before it schedules the update.
+  validations:
+    required: false    
 
 - type: textarea
   id: system
   attributes:
     label: System
     description: |
-      Copy and paste the results of the raspinfo command in to this section.
+      Copy and paste the results of the `raspinfo` command in to this section.
       Alternatively, copy and paste a pastebin link, or add answers to the following questions:
       * Which OS and version (`cat /etc/rpi-issue`)?
       * Which bootloader version (`vcgencmd bootloader_version`)?