use a specific stale label for needs info handling to solve conflict

each stale bot needs to have its own stale label such that it does not
remove the label added by the other bot

that can happen due to needs info bot removing stale label on issues
that have both bug and needs info labels

Signed-off-by: Matthieu Gallien <matthieu.gallien@nextcloud.com>

.github/workflows/needsinfo.yml

@@ -14,6 +14,7 @@ jobs:
                     days-before-close: 14
                     days-before-pr-close: -1
                     only-labels: 'needs info'
+                    stale-issue-label: 'stale needs info'
                     exempt-issue-labels: 'bug'
                     stale-issue-message: 'This issue has been marked as "needs info" 4 weeks ago.
                                         Please take a look again and try to provide the information requested,