LaTeX resume templates exist if you wanna get extremely fancy with it. Otherwise, any text editing document that allows some basic level of formatting and headers will do the trick. If I get sent an extremely beautiful and well-formatted resume to read, it's a "good attention to detail" footnote in my mind but ultimately the actual content is much more important.
Since we're on the subject of resumes though, an open message to anyone who might be reading... Don't have an LLM help you write your resume. It's extremely obvious and makes your resume worse because it gets real generic and wordy with it. I've seen them, I've not been impressed by them, it makes me think this person may not actually be able to write coherently on their own.
And remember, a resume is a personal advertisement for you - make it punchy, and keep to bullet points highlighting impressive things you want a recruiter and hiring manager to know. Include buzzwords as pulled directly from the job posting to get through automated screening. Highlight projects you've done and what positive effect they had on the intended audience.