implement RFC4 in issue / PR templates (#1580) (#1581)

* implement RFC4 in issue / PR templates (#1580)

* fix

Author: tomkralidis

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,6 +7,12 @@ assignees: ''
 
 ---
 
+<!--
+
+Please note that this Issue is subject to RFC4: https://pygeoapi.io/development/rfc/4
+
+-->
+
 **Description**
 A clear and concise description of what the bug is.
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,6 +7,12 @@ assignees: ''
 
 ---
 
+<!--
+
+Please note that this Issue is subject to RFC4: https://pygeoapi.io/development/rfc/4
+
+-->
+
 **Is your feature request related to a problem? Please describe.**
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,15 @@
 # Overview
 
-# Related issue / discussion
+# Related Issue / discussion
+
+<!--
+
+Is there an existing Issue that this PR addresses?  Does this PR need a new Issue?
+
+Non-trivial PRs are best put forth initially as an Issue so that there can be
+discussion and consensus before a PR is put forth.
+
+-->
 
 # Additional information