Update issue templates (kubernetes-sigs#738)

* Update issue templates

* Updates artifacts for v0.3.0-rc.1 release

Signed-off-by: Kellen Swain <[email protected]>

* Updates bbr chart for v0.3.0-rc.1 release

Signed-off-by: Kellen Swain <[email protected]>

* Updates artifacts for v0.3.0 release

Signed-off-by: Kellen Swain <[email protected]>

* Adding blank issue template so that all issues start with  label

---------

Signed-off-by: Kellen Swain <[email protected]>

Author: kfswain

.github/ISSUE_TEMPLATE/issue_template.md

@@ -0,0 +1,8 @@
+---
+name: Blank Issue
+about: ''
+title: ''
+labels: needs-triage
+assignees: ''
+
+---