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: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Start printer
+2. Move axis by '....'
+3. Start printing '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Photos of the print / output of the terminal**
+If applicable, add photos or console outputs to help explain your problem.
+
+**Printer (please complete the following information):**
+ - Firmware: [e.g. 181227]
+ - Printing method [e.g. SD, USB (OctoPrint, Cura, ...)]
+ - Model [e.g. i3 Mega, Mega-S]
+
+**M503 Output**
+Please paste the complete output of the `M503` command here.