founder-pitch.pdf is not deployed to GitHub Pages by CI #30

What happens: The latexmk.yml CI workflow only copies sales-deck.pdf into the gh-pages deployment folder (cp sales-deck.pdf gh-pages). The founder-pitch.pdf file is built by the all target in Makefile alongside sales-deck.pdf, but is never copied to gh-pages, so it is unavailable at https://zerocracy.github.io/sales-deck/founder-pitch.pdf.

What should happen: Both PDFs produced by make all — sales-deck.pdf and founder-pitch.pdf — should be copied into the gh-pages folder and deployed to GitHub Pages.