More detailed comments

Signed-off-by: RD WebDesign <github@rdwebdesign.com.br>

.github/workflows/stale_pr.yml

@@ -1,7 +1,7 @@
 name: Close stale PR
 # This action will add a `stale` label and close immediately every PR that meets the following conditions:
 #   - it is already marked with "merge conflict" label
-#   - the "merge conflict" label was added more than 30 days before.
+#   - there was no update/comment on the PR in the last 30 days.
 
 on:
   schedule:
@@ -20,9 +20,11 @@ jobs:
       - uses: actions/stale@v7.0.0
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          # Do not mark a PR as stale
+          # Do not automatically mark PR/issue as stale
           days-before-stale: -1
+          # Override 'days-before-stale' for PR only
           days-before-pr-stale: 30
+          # Close PRs immediately, after marking them 'stale'
           days-before-pr-close: 0
           # only run the action on merge conflict PR
           any-of-labels: 'PR: Merge Conflict'