build: use new Issue Template types in templates (#44224)

* build: use new Issue Template types in templates

* build: restore existing labels for now

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,6 +1,6 @@
 name: Bug Report
-description: Report an Electron bug
-title: "[Bug]: "
+description: Report a bug in Electron
+type: 'bug'
 labels: "bug :beetle:"
 body:
 - type: checkboxes

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,6 +1,6 @@
 name: Feature Request
 description: Suggest an idea for Electron
-title: "[Feature Request]: "
+type: 'enhancement'
 labels: "enhancement :sparkles:"
 body:
 - type: checkboxes