Merge pull request #359 from per1234/moderator-instructions-docs-staging-site-link

Add "staging site" forum access instructions link to "Moderator Instructions" asset docs

Author: per1234

.markdown-link-check.json

@@ -101,6 +101,9 @@
     {
       "pattern": "^https://forum\\.arduino\\.cc/t/moderation-guidelines/54905$"
     },
+    {
+      "pattern": "^https://forum\\.arduino\\.cc/t/staging-site-sandbox-forum-instance/1112538$"
+    },
     {
       "pattern": "^https://forum\\.arduino\\.cc/t/this-forum-section-will-be-in-read-only/376698$"
     },

content/categories/staff/moderation/_topics/moderator-instructions/README.md

@@ -15,3 +15,5 @@
 - https://forum.arduino.cc/t/draft-proposal-for-moderator-documentation/623114 (private)
 - https://meta.discourse.org/t/discourse-moderation-guide/63116
 - https://forum.arduino.cc/t/about-user-account-deletion-and-user-content-deletion/627095 (private)
+- ["Staging site" sandbox forum access instructions](https://forum.arduino.cc/t/staging-site-sandbox-forum-instance/1112538) (private)
+  - This can be used for testing during the development of standard moderation procedures.