fix typos in crossinterp.c and qsbr.c (#142612)

Python/crossinterp.c

@@ -3185,7 +3185,7 @@ _PyXI_InitTypes(PyInterpreterState *interp)
                 "failed to initialize the cross-interpreter exception types");
     }
     // We would initialize heap types here too but that leads to ref leaks.
-    // Instead, we intialize them in _PyXI_Init().
+    // Instead, we initialize them in _PyXI_Init().
     return _PyStatus_OK();
 }
 

Python/qsbr.c

@@ -57,7 +57,7 @@ qsbr_allocate(struct _qsbr_shared *shared)
     return qsbr;
 }
 
-// Initialize (or reintialize) the freelist of QSBR thread states
+// Initialize (or reinitialize) the freelist of QSBR thread states
 static void
 initialize_new_array(struct _qsbr_shared *shared)
 {