ThreadModuleBuiltins: typo

Author: cosminbasca

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/ThreadModuleBuiltins.java

@@ -197,7 +197,7 @@ long start(VirtualFrame frame, Object cls, Object callable, Object args, Object
 
                 try (GilNode.UncachedAcquire gil = GilNode.uncachedAcquire()) {
                     // n.b.: It is important to pass 'null' frame here because each thread has it's
-                    // ownstack and if we would pass the current frame, this would be connected as
+                    // own stack and if we would pass the current frame, this would be connected as
                     // a caller which is incorrect. However, the thread-local 'topframeref' is
                     // initialized with EMPTY which will be picked up.
                     callNode.execute(null, callable, arguments, keywords);