task: Add type attribute to issue templates

Simplify triage by assigning a type to each issue.

Author: dcalhoun

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,5 +1,6 @@
 name: Bug report
 description: Report a bug with the WordPress block editor or Gutenberg plugin
+type: Bug
 labels: ['[Type] Bug']
 body:
     - type: markdown
@@ -74,4 +75,4 @@ body:
               - label: 'Block'
               - label: 'Classic'
               - label: 'Hybrid (e.g. classic with theme.json)'
-              - label: 'Not sure'
+              - label: 'Not sure'

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,6 +1,7 @@
 ---
 name: Feature request
 about: Propose an idea for a feature or an enhancement
+type: Bug
 labels: "[Type] Enhancement"
 ---