.github/ISSUE_TEMPLATE: Suggest '/kind bug' and '/kind feature'

So Prow's label plugin [1] can apply the appropriate label for us.

[1] https://github.com/kubernetes/test-infra/tree/master/prow/plugins/label

Signed-off-by: W. Trevor King <wking@tremily.us>

.github/ISSUE_TEMPLATE.md

@@ -18,13 +18,10 @@ executes Buildah to perform container builds, and as such the Buildah
 maintainers are best equipped to handle these bugs.
 -->
 
-**Is this a BUG REPORT or FEATURE REQUEST?**:
+**Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)**
 
-[//]: # Uncomment only one, leave it on its own line:
-
-[//]: # **kind bug**
-
-[//]: # **kind feature**
+/kind bug
+/kind feature
 
 **Description**