chore: swap fan header part number

chore(main): release backplane 0.7.7 (#78) * chore(main): release backplane 0.7.7 * chore: update KiCad revisions --------- Co-authored-by: mikesmitty

fix: add qr code for serial numbers

chore: add tweaks for production

chore(main): release backplane 0.7.6 (#60) * chore(main): release backplane 0.7.6 * chore: update KiCad revisions --------- Co-authored-by: mikesmitty

fix: move fan headers so 4-pin fan plugs fit

chore(main): release backplane 0.7.5 (#58) * chore(main): release backplane 0.7.5 * chore: update KiCad revisions --------- Co-authored-by: mikesmitty

fix: add reverse polarity protection mosfet

chore(main): release backplane 0.7.4 (#56) * chore(main): release backplane 0.7.4 * chore: update KiCad revisions --------- Co-authored-by: mikesmitty

fix: make sure the input has a gnd