Update docs/source/dev/hwobj_signals.md

Co-authored-by: fabcor <[email protected]>

docs/source/dev/hwobj_signals.md

@@ -36,7 +36,7 @@ From the _BaseHardwareObject_ class (removing extra lines for brevity):
         dispatcher.send(signal, self, *args)
 ```
 
-So, in a custom hardware object, since inhnerits from _BaseHardwareObject_, one only needs to call: 
+So, in a custom hardware object, since it inherits from {py:class}`HardwareObject`, one only needs to call: 
 ```
 self.emit('my_signal', new_value)
 ```