Enhance issue/PR templates asking for details

.github/ISSUE_TEMPLATE.md

@@ -1,3 +1,17 @@
 <!--
 Thanks for raising a Spring Session issue. Please provide a brief description of your problem along with the version of Spring Session that you are using. If possible, please also consider putting together a sample application that reproduces the issue.
 -->
+
+### Following link https://pivotal.io/security should be used to report security related issues
+
+### Expected behavior
+
+### Actual behavior
+
+### Steps to reproduce
+
+### Reactor Netty version
+
+### JVM version (e.g. `java -version`)
+
+### OS version (e.g. `uname -a`)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1,17 @@
 <!--
 Thanks for contributing to Spring Session. Please provide a brief description of your pull-request and reference any related issue numbers (prefix references with #).
 -->
+
+### Following link https://pivotal.io/security should be used to report security related issues
+
+### Expected behavior
+
+### Actual behavior
+
+### Steps to reproduce
+
+### Reactor Netty version
+
+### JVM version (e.g. `java -version`)
+
+### OS version (e.g. `uname -a`)