typo in the text

[Acrasy]

What is this PR for? fixed a typo where "not" was missing the 't' at the end

What type of PR is it? bug/typo fix i suppose

How should this be tested? it is only a textual change

Questions:

• Do the licenses files need update? No
• Are there breaking changes for older versions? No
• Does this needs documentation? No

[neu5ron]

thanks! fixing in next update