chore: fix title

.github/ISSUE_TEMPLATE/1_user_support.yml

@@ -1,6 +1,6 @@
 name: User Support
 description: Questions for this action
-title: ""
+title: "support: "
 labels: support
 assignees: peaceiris
 body:

.github/ISSUE_TEMPLATE/2_bug_report.yml

@@ -1,6 +1,6 @@
 name: Bug Report
 description: Try the User Support Issue Template first.
-title: ''
+title: 'bug: '
 labels: bug
 assignees: peaceiris
 body:

.github/ISSUE_TEMPLATE/3_proposal.yml

@@ -1,6 +1,6 @@
 name: Proposal
 description: Suggest an idea for this project
-title: ''
+title: 'proposal: '
 labels: proposal
 assignees: peaceiris
 body: