Update AV1825 guideline (#377)

Split from #298.

Co-authored-by: Dennis Doomen <dennis.doomen@greenchoice.nl>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

_rules/1825.md

@@ -1,7 +1,9 @@
 ---
 rule_id: 1825
 rule_category: performance
-title: Prefer `Task.Run` or `Task.Factory.StartNew` for CPU-intensive activities
+title: Prefer `Task.Run` for CPU-intensive activities
 severity: 1
 ---
-If you do need to execute a CPU bound operation, use `Task.Run` to offload the work to a thread from the Thread Pool. For long-running operations use `Task.Factory.StartNew` with `TaskCreationOptions.LongRunning` parameter to create a new thread. Remember that you have to marshal the result back to your main thread manually.
+If you need to execute a CPU-bound operation, use `Task.Run` to offload the work to a thread from the Thread Pool. Remember that you have to marshal the result back to your main thread manually.
+
+For long-running operations, use `Task.Factory.StartNew` with `TaskCreationOptions.LongRunning` to hint the runtime to use a dedicated thread instead of a thread pool thread.