Update issue templates (#3)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,15 @@
+---
+name: Glossary update
+about: Improve an existing glossary term
+
+---
+
+**Describe the update**
+
+A clear and concise description of the suggested glossary update.
+What term do you want to update, why, and how?
+
+**Additional context**
+
+Add any other context about the glossary term here, including
+links to web pages or publications where the term is used in context.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,15 @@
+---
+name: Glossary addition
+about: Suggest an new term for the glossary
+
+---
+
+**Describe the new term and its definition**
+
+A clear and concise description of the new glossary term, with
+a definition if you have one. 
+
+**Additional context**
+
+Provide links and URLs of this term in use in publications
+or on the Internet in the context of edge computing.