org-html-creator-string

org-html-creator-string is a variable defined in `ox-html.el'.
Its value is

"Emacs 25.0.50.2 (Org mode 8.2.10)"

Documentation:
Information about the creator of the HTML document.
This option can also be set on with the CREATOR keyword.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.