Always sign off wrapper updates in the commit message

[IsakTheHacker]

It is good practice to always signoff commits, especially in update bots like this. Dependabot already does it and it would be awesome to add this feature here also. Something like this but replaced with the actual name and email:

...
Signed-off-by: dependabot[bot] <[email protected]>

Note: There is a GitHub bot called DCO that checks PRs to see if the commits are correctly signed-off, that is what made me aware of this