That actually is referenced in the full text of the impeachment resolution[1]:
"President Trump’s conduct on January 6, 2021, followed his prior efforts to subvert and obstruct the certification of the results of the 2020 Presidential election. Those prior efforts included a phone call on January 2, 2021, during which President Trump urged the secretary of state of Georgia, Brad Raffensperger, to “find” enough votes to overturn the Georgia Presidential election results and threatened Secretary Raffensperger if he failed to do so."
"President Trump’s conduct on January 6, 2021, followed his prior efforts to subvert and obstruct the certification of the results of the 2020 Presidential election. Those prior efforts included a phone call on January 2, 2021, during which President Trump urged the secretary of state of Georgia, Brad Raffensperger, to “find” enough votes to overturn the Georgia Presidential election results and threatened Secretary Raffensperger if he failed to do so."
https://www.congress.gov/bill/117th-congress/house-resolutio...