Added comment

Author: Progi1984

.github/workflows/publish.yml

@@ -37,6 +37,9 @@ jobs:
 
       - uses: actions/checkout@v2
 
+      ## Check if there are modifications in the base/ directory
+      ## and store it in the variable `steps.changes.outputs.base`
+      ## The variable is built like: steps.{#id}.outputs.{#filter}
       - uses: dorny/paths-filter@v2
         id: changes
         with: