update stale-bot messages

Author: Christopher Doris

.github/workflows/stale.yaml

@@ -14,20 +14,40 @@ jobs:
         with:
           exempt-all-milestones: true
           days-before-issue-stale: 30
-          stale-issue-message: >
-            This issue has been marked as stale because it has been open for 30 days with no
-            activity. If the issue is still relevant then please leave a comment, or else it
-            will be closed in 7 days.
+          stale-issue-message: |
+            Thank you for taking the time to report this issue!
+
+            However, it has been marked as stale because there has been no activity for 30
+            days. As with many open source projects, the maintainers work for free and do
+            not always have enough time to address all issues.
+
+            For questions, please check the documentation, other issues, or consider asking
+            elsewhere such as Stack Overflow or Julia Discourse. For bugs, please try to
+            find a fix yourself and consider opening a pull request. If you're still stuck,
+            please leave a comment below.
+
+            If there is no further activity in 7 days, this issue will be automatically
+            closed.
           days-before-pr-stale: 60
-          stale-pr-message: >
-            Thank you for your pull request. It has been marked as stale because it has been
-            open for 60 days with no activity. If the PR is still relevant then please leave
-            a comment, or else it will be closed in 30 days.
+          stale-pr-message: |
+            Thank you for taking the time to create this pull request!
+
+            However, it has been marked as stale because there has been no activity for 60
+            days. As with many open source projects, the maintainers work for free and do
+            not always have enough time to review all PRs.
+
+            Please ensure that all tests are passing, and that any new functionality has
+            corresponding new tests (which should fail on old code and pass on new code).
+            Also ensure any changes are documented or commented appropriately. If you're
+            sure the PR is ready for review, please leave a comment below.
+
+            If there is no further activity in 7 days, this issue will be automatically
+            closed.
           days-before-issue-close: 7
-          close-issue-message: >
-            This issue has been closed because it has been stale for 7 days. You can re-open
-            it if it is still relevant.
+          close-issue-message: |
+            This issue has been closed because it has been stale for 7 days. If it is still
+            relevant, please re-open it.
           days-before-pr-close: 30
-          close-pr-message: >
-            This PR has been closed because it has been stale for 30 days. You can re-open
-            it if it is still relevant.
+          close-pr-message: |
+            This PR has been closed because it has been stale for 30 days. If it is still
+            relevant, please re-open it.