restrict blank issues

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a bug report
 title: ''
-labels: bug
+labels: bug, needs triage
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,4 @@
-blank_issues_enabled: true
+blank_issues_enabled: false
 contact_links:
   - name: .NET issues
     url: https://github.com/dotnet/runtime#filing-issues

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: feature request
+labels: feature request, needs triage
 assignees: ''
 ---