[skip ci] fix stalebot (#476)

Author: Massimiliano Pippi

.github/workflows/stale.yaml

@@ -26,7 +26,7 @@ jobs:
             const issues = await github.paginate(opts);
 
             // Set this value to whatever makes sense for the repo.
-            let elapsedDays = 15
+            let elapsedDays = 30
 
             let elapsed = elapsedDays * 24 * 60 * 60 * 1000;
             let now = new Date().getTime();
@@ -88,7 +88,7 @@ jobs:
             const issues = await github.paginate(opts);
 
             // Set this value to whatever makes sense for the repo.
-            let elapsedDays = 30;
+            let elapsedDays = 15;
 
             let elapsed = elapsedDays * 24 * 60 * 60 * 1000;
             let now = new Date().getTime();