Update triage-procedure.md

src/en/wizden-staff/maintainer/triage-procedure.md

@@ -36,7 +36,7 @@ While not mandatory, it's likely that the following label categories will be rel
 
 Once a triage is completed, remove the `S: Untriaged` label and attach 'S: Needs Review' for PRs, or 'S: Requires Content PR' for Issues (alternative labels may be more appropriate, such as when closing an issue).
 
-### Old Issue / PR Triage
+### Old Issue / PR Re-Triage
 
 If an item have not been interacted with for a long time (>1 month), it *may* be relevant to re-triage. There are no labels to indicate an old item requires re-triage.
 
@@ -59,3 +59,19 @@ Each label has a description that explains what is to be used for in its categor
 | Priority | P | How important the item is to the project. Contributors may tackle any item as they see fit, but this category should help guide what is important. |
 | Size | size | How large the PR is codewise. Will ideally be automatically generated by Github. |
 | Status | S | The current status for the item. There should be at least one label in this category, though at times multiple may be applicable. |
+
+## Non-Triager Labels
+
+Some labels should not be used/removed by Triagers, as they are either automatically applied or are to be used at Maintainer/PM discretion only.
+
+| Label | Reason |
+|---|---|
+| Changes category | Applied automatically.* |
+| Fun category | Only at Maintainer/PM discretion. |
+| Size category | Applied automatically.* |
+| S: Approved | Only Maintainers can approve items. |
+| S: Awaiting Changes | Applied automatically. |
+| S: Conceptual Approval | Can only be applied by a Maintainer, following Review Procedure. |
+| S: Undergoing Maintainer Discussion | Maintainer Discussions are at Maintainers' discretion. |
+
+\* May still be applied in certain cases, if the automatic labelling is not working/not implemented.