Fix typo

Author: michaelosthege

doc/LICENSE.txt

@@ -11,7 +11,7 @@ All rights reserved.
 
 Contains code from NumPy, Copyright (c) 2005-2016, NumPy Developers.
 Contains code from Aesara, Copyright (c) 2021-2022, Aesara Developers.
-AAll rights reserved.
+All rights reserved.
 
 theano/scan/*.py[c]: Razvan Pascanu, Frederic Bastien, James Bergstra, Pascal Lamblin, Arnaud Bergeron, PyMC Developers, Pytensor Developers, (c) 2010, Universite de Montreal
 theano/tensor/sharedvar.py: James Bergstra, (c) 2010, Universite de Montreal, 3-clause BSD License