Update label names in the issue templates

Author: LourensVeen

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a report to help us improve
 title: ''
-labels: bug
+labels: 'kind: bug'
 assignees: ''
 
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.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest a feature or improvement for AMUSE
 title: ''
-labels: feature request
+labels: 'kind: feature request'
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/question.md

@@ -2,7 +2,7 @@
 name: Question
 about: Ask an AMUSE-related question
 title: ''
-labels: question
+labels: 'kind: question'
 assignees: ''
 
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