Updated README

Author: darcyg32

README.md

@@ -57,7 +57,7 @@ Releasing the lock before running user code keeps other workers from blocking on
 - Thread-safe task queue with efficient worker wake-ups.
 - Template-based `submit()` accepts lambdas, function objects, or function pointers.
 - Graceful shutdown that drains outstanding work.
-- Zero external dependencies—pure standard library.
+- Zero external dependencies. Pure standard library.
 
 ## Building and Running