docs: Add LiveEditor Beta

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -17,6 +17,9 @@ body:
         - Use a clear and concise title
         - Fill out the text fields with as much detail as possible.
         - Never be shy to give us screenshots and/or code samples. It will help!
+
+        There is a chance that the bug is already fixed in the latest version, but not released yet. 
+        So please check in [Live Editor - Beta](https://beta.mermaid.live) before raising an issue.
   - type: textarea
     attributes:
       label: Description
@@ -43,7 +46,7 @@ body:
     attributes:
       label: Code Sample
       description: |-
-        If applicable, add the code sample or a link to the [Live Editor](https://mermaid.live).
+        If applicable, add the code sample or a link to the [Live Editor - Beta](https://beta.mermaid.live).
         Any text pasted here will be rendered as a Code block.
       render: text
   - type: textarea

.github/ISSUE_TEMPLATE/config.yml

@@ -7,8 +7,11 @@ contact_links:
     url: https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE
     about: Join our Community on Slack for Help and a casual chat.
   - name: Documentation
-    url: https://mermaid-js.github.io
+    url: https://mermaid.js.org
     about: Read our documentation for all that Mermaid.js can offer.
   - name: Live Editor
     url: https://mermaid.live
     about: Try the live editor to preview graphs in no time.
+  - name: Live Editor - Beta
+    url: https://beta.mermaid.live
+    about: Try unreleased changes in the develop branch.