Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+For general boot questions please check the read the [Boot Problems] (https://www.raspberrypi.org/forums/viewtopic.php?t=58151) sticky post on the forums. 
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+
+**Expected behaviour**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add a photograph of the bootloader HDMI diagnostics screen.
+
+**Bootloader version and configuration**
+If you have modified the default bootloader release or configuration then please attach the bootloader configuration (vcgencmd bootloader_config) and version (vcgencmd bootloader_version)
+
+**SD card boot (please complete the following information):**
+ - OS e.g. Raspbian
+ - SD card type
+ - Partition information (fdisk -l) if you are able to obtain this from another computer.
+
+**Network boot (please complete the following information):**
+Network boot configuration can get very complicated. To get started we recommend using [PiServer](https://github.com/raspberrypi/piserver) and this is the official test/reference configuration. For other configurations, packet capture or a UART log is nearly always required because setting up custom network configurations to investigate bugs is extremely time-consuming and error-prone.
+
+ - DHCP server configuration files e.g. dnsmasq.conf
+ - Wireshark binary packet capture
+ - UART logs
+
+**USB boot (please complete the following information):**
+For issues booting with specific USB devices please verify that the system boots from an SD-card with the same devices connected and attach the results of 'lsusb -vvv'. This helps to rule out USB HUB power issues.
+In the beta release it's likely that a UART or NetConsole boot trace will be required.
+
+**Additional context**
+Add any other context about the problem here.