minor #14321 [Lock] fix "time to leave" typo ("time to live") (MrMitch)

This PR was submitted for the 5.1 branch but it was merged into the 4.4 branch instead.

Discussion
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[Lock] fix "time to leave" typo ("time to live")

This fixes a typo in one of the warnings about the TTL for expiring stores where TTL was expanded as *time to leave* instead of *time to live*.

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Commits
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d7cd85d [lock] fix "time to leave" typo ("time to live")

Author: javiereguiluz

components/lock.rst

@@ -478,7 +478,7 @@ Using the above methods, a more robust code would be::
 .. caution::
 
     Choose wisely the lifetime of the ``Lock`` and check whether its remaining
-    time to leave is enough to perform the task.
+    time to live is enough to perform the task.
 
 .. caution::