Correct term spelling

Author: donbarbos

Doc/library/threading.rst

@@ -65,9 +65,8 @@ threading when it comes to CPU-bound tasks, as only one thread can execute
 Python bytecode at a time. Despite this, threads remain a useful tool for
 achieving concurrency in many scenarios.
 
-*(Experimental free-threaded builds of CPython disable the :term:`GIL`,
-enabling true parallel execution of threads, but this feature is still under
-development.)*
+*(Experimental free-threaded builds of CPython disable the GIL, enabling true
+parallel execution of threads, but this feature is still under development.)*
 
 A typical use case for :mod:`threading` includes managing a pool of worker
 threads that can process multiple tasks concurrently.  This basic example of