Fix docs

Author: m-kuhn

python/core/auto_generated/qgsreadwritelocker.sip.in

@@ -22,7 +22,7 @@ QgsReadWriteLocker can be used in such situations to ensure that the state of th
 QgsReadWriteLocker should be created within a function where a QReadWriteLock needs to be locked.
 The lock may be locked when QgsReadWriteLocker is created or when changeMode is called.
 You can unlock and relock the lock with unlock() and changeMode().
-If locked, the mutex will be unlocked when the QgsReadWriteLocker is destroyed.
+If locked, the lock will be unlocked when the QgsReadWriteLocker is destroyed.
 
 .. versionadded:: 3.4
 %End

src/core/qgsreadwritelocker.h

@@ -33,7 +33,7 @@
  * QgsReadWriteLocker should be created within a function where a QReadWriteLock needs to be locked.
  * The lock may be locked when QgsReadWriteLocker is created or when changeMode is called.
  * You can unlock and relock the lock with unlock() and changeMode().
- * If locked, the mutex will be unlocked when the QgsReadWriteLocker is destroyed.
+ * If locked, the lock will be unlocked when the QgsReadWriteLocker is destroyed.
  *
  * \since QGIS 3.4
  */