Add Security Policy

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -8,6 +8,9 @@ body:
   - type: markdown
     attributes:
       value: |-
+        ## Security vulnerabilities
+        Please refer our [Security Policy](https://github.com/mermaid-js/.github/blob/main/SECURITY.md) and report to keep vulnerabilities confidential so we can release fixes first.
+
         ## Before you submit...
         We like to help you, but in order to do that should you make a few things first:
 

.github/ISSUE_TEMPLATE/config.yml

@@ -3,6 +3,9 @@ contact_links:
   - name: GitHub Discussions
     url: https://github.com/mermaid-js/mermaid/discussions
     about: Ask the Community questions or share your own graphs in our discussions.
+  - name: Security Vulnerability
+    url: https://github.com/mermaid-js/.github/blob/main/SECURITY.md
+    about: Report security issues
   - name: Slack
     url: https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE
     about: Join our Community on Slack for Help and a casual chat.