Update phrasing in Thread.md

Update phrasing, as requested in comments, for clarity.

Author: Amanda Butler

docs/api/rtos/Thread.md

@@ -91,9 +91,9 @@ The Callback API provides a convenient way to pass arguments to spawned threads.
 
 ## Debugging tips
 
-When debugging Thread, check the full RTX state (ready, blocked and so on) for a deadlock (two things waiting for each other) or a missed signal leading to an event machine stall. You can confirm a deadlock if you see two threads in the "blocked" state waiting for a resource that the other is supposed to signal.
+When debugging threads, check the full RTX state (ready, blocked and so on) for a deadlock (two things waiting for each other) or a missed signal leading to an event machine stall. You can confirm a deadlock if you see two threads in the "blocked" state each waiting for a resource that the other is supposed to signal.
 
-To reduce deadlocks, proactively code in a safe way by maintaining a mental ordering of your mutexes and never claiming a high-level mutex while holding a low-level one.
+To reduce deadlocks, proactively code in a safe way by never claiming a high-level mutex while holding a low-level one.
 
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