[github] update issue label names (#12039)

Co-authored-by: Bénédikt Tran <[email protected]>

Author: jayaddison

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -1,6 +1,6 @@
 name: Bug report
 description: Something is not working correctly.
-labels: "bug"
+labels: "type:bug"
 
 body:
   - type: textarea

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: '<short description for the feature>'
-labels: 'enhancement'
+labels: 'type:proposal'
 assignees: ''
 
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