Add access notes to GH Projects Guide page with note format

Author: egrace479

docs/wiki-guide/Guide-to-GitHub-Projects.md

@@ -9,9 +9,15 @@ When starting a new project, it can be helpful to have a shared tracker or proje
     - Clicking on an assignees profile image will show only that person's assigned tasks (similarly for labels and milestones attached to tasks).
  - More columns/categories can be added for different aspects of the project.
  - Multiple repos can be linked to a single project.
+    - Access to issues _is_ controlled by repo access permissions; only the existence of issues is universal to the project.
  - Closing an issue will automatically move the task to "Done".
  - Tasks can be reordered within their columns/categories to keep most pressing tasks at the top.
 
 ## Interacting with GitHub Projects
-To help you get started working with [GitHub Projects](https://docs.github.com/en/issues/planning-and-tracking-with-projects/learning-about-projects/about-projects), we have an [Imageomics General Project Template](https://github.com/orgs/Imageomics/projects/31/views/1) with both a [Taskboard](https://github.com/orgs/Imageomics/projects/31/views/1) and [Table](https://github.com/orgs/Imageomics/projects/31/views/2) view initialized, along with label and milestone displays turned on. 
-Both of these views will automatically stay updated so that each member of the project can utilize whichever version they find most informative. Issues can be added directly to the project board/table or on the repo (if added on the repo, they must be linked to the project, and have status assigned). Milestones must be created on the repo (under the Issues tab, select "Milestones" to create one).
+To help you get started working with [GitHub Projects](https://docs.github.com/en/issues/planning-and-tracking-with-projects/learning-about-projects/about-projects), we have a [General Project Template](https://github.com/orgs/Imageomics/projects/31/views/1) with both a [Taskboard](https://github.com/orgs/Imageomics/projects/31/views/1) and [Table](https://github.com/orgs/Imageomics/projects/31/views/2) view initialized, along with label and milestone displays turned on. 
+Both of these views will automatically stay updated so that each member of the project can utilize whichever version they find most informative. 
+
+Issues can be added directly to the project board/table or on the repo. If added through the repo, they must be linked to the project and have status assigned. Milestones must be created on the repo (under the Issues tab, select "Milestones" to create one), similarly for labels. 
+
+!!! note "Note"
+    Issues on a project board that are linked to a repository to which a user does not have access will not be visible to them, even if they have access to the project. They will show up (for that user) as unidentified issues with no status.