build: Set Java language level (#2380)

* update language level

* update stale bot config

* update gh actions build

.github/stale.yml

@@ -1,7 +1,7 @@
 # Configuration for probot-stale - https://github.com/probot/stale
 
 # Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 30
+daysUntilStale: 60
 
 # Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
 # Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
@@ -29,7 +29,7 @@ staleLabel: "status: stale"
 # Comment to post when marking as stale. Set to `false` to disable
 markComment: >
   This issue has been automatically marked as stale because it has not had
-  recent activity. It will be closed if no further activity occurs. Thank you
+  recent activity. The issue will be unassigned if no further activity occurs. Thank you
   for your contributions.
 
 # Comment to post when removing the stale label.
@@ -47,13 +47,15 @@ limitPerRun: 30
 # only: issues
 
 # Optionally, specify configuration settings that are specific to just 'issues' or 'pulls':
-# pulls:
-#   daysUntilStale: 30
-#   markComment: >
-#     This pull request has been automatically marked as stale because it has not had
-#     recent activity. It will be closed if no further activity occurs. Thank you
-#     for your contributions.
+pulls:
+  daysUntilStale: 30
+  daysUntilClose: 45
+  markComment: >
+    This pull request has been automatically marked as stale because it has not had
+    recent activity. It will be closed if no further activity occurs.
+  closeComment: >
+    Closed due to inactivity. Thank you for your contributions.
 
 # issues:
 #   exemptLabels:
-#     - confirmed
+#     - confirmed