Fix github issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a report to identify a potential issue
 title: 'BUG: '
-labels: Bug
+labels: bug
 assignees: ''
 ---
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for the Unity UI Extensions
 title: 'Feature Request: '
-labels: Feature Request
+labels: enhancement
 assignees: ''
 ---
 

.github/ISSUE_TEMPLATE/request_for_information.md

@@ -2,7 +2,7 @@
 name: Request for Information
 about: Not sure how to do something, just ask.
 title: 'RFI: '
-labels: Question
+labels: question
 assignees: ''
 ---