So not Einstein, just the fact that it was "woman" not "man" makes it obvious enough. This is from a website called quoteinvestigator.com
Quote Investigator: Probably not. It does not appear in the comprehensive collection of quotations “The Ultimate Quotable Einstein” from Princeton University Press.
The earliest evidence of the saying that QI has located appeared in the 1970s. The 1973 self-help book “The Wonderful Crisis of Middle Age” by Eda LeShan contained a discussion about creativity that included a version of the saying, and the author did not attribute the words to Albert Einstein. She stated that the quotation was from a poster she had seen, and in a footnote she identified Alan Ashley-Pitt as the creator:
The man who follows the crowd will usually get no further than the crowd. The man who walks alone is likely to find himself in places no one has ever been before.