test labels list in templates (#13783)

See issue #13615, testing since this is a P2 issue.

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,8 +1,8 @@
 ---
 name: Bug Report
 about: Report a bug encountered with Kubernetes Website
-labels: kind/bug
-
+labels:
+- kind/bug
 ---
 **This is a Bug Report**
 
@@ -12,10 +12,8 @@ labels: kind/bug
 <!--Required Information-->
 **Problem:**
 
-
 **Proposed Solution:**
 
-
 **Page to Update:**
 https://kubernetes.io/...
 

.github/ISSUE_TEMPLATE/feature-request.md

@@ -1,8 +1,8 @@
 ---
 name: Feature Request
 about: Suggest a/an feature/enhancement to the Kubernetes Website project
-labels: kind/feature
-
+labels:
+- kind/feature
 ---
 **This is a Feature Request**
 

.github/ISSUE_TEMPLATE/support.md

@@ -1,10 +1,11 @@
 ---
 name: Support Request
 about: Support request or question relating to Kubernetes Dashboard project
-labels: triage/support
-
+labels:
+- triage/support
 ---
 **This is Support**
+
 <!--
 STOP -- PLEASE READ!