Update issue templates

add `needs-triage` label to bug reports

Author: coreyarnold

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: "Bug report \U0001F41B"
 about: Create a report to help us improve
 title: ''
-labels: bug
+labels: bug, needs-triage
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -4,7 +4,7 @@ about: Suggest an idea for this project
 title: ''
 labels: ''
 assignees: ''
-priority: ''
+
 ---
 
 ### Is your feature request related to a problem? Please describe.