Update issue templates

Author: rsms

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1.
+2.
+3.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment**
+- OS: [e.g. macOS 10.14]
+- App that renders the font [if applicable; e.g. Chrome, Adobe Illustrator]
+- Version of font [e.g. "Inter UI Regular 3.0;8cf05e4a" — you can use fontdrop.info to find out the version]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea
+
+---
+
+A clear and concise description of what you want to happen or see change.
+
+**Additional context**
+- Alternatives you've considered
+- Add any other context or screenshots about the feature request here.
+- If this is related to a problem, describe the problem.