issue templates: edit labels and projects syntax

.github/ISSUE_TEMPLATE/bug-report.md

@@ -2,9 +2,9 @@
 name: "\U0001F41B Bug report"
 about: Create a report to help us fix things
 title: ''
-labels: 'bug,needs-triage'
+labels: ['bug', 'needs-triage']
 assignees: ''
-projects: 'nightscout/2'
+projects: ['nightscout/2']
 
 ---
 ## Describe the bug

.github/ISSUE_TEMPLATE/feature-request.md

@@ -2,9 +2,9 @@
 name: "\U0001F4A1 Feature request \U0001F4A1"
 about: Suggest an idea for this project
 title: ''
-labels: 'feature,needs-triage'
+labels: ['feature', 'needs-triage']
 assignees: ''
-projects: 'nightscout/2'
+projects: ['nightscout/2']
 
 ---