update .gitignore

hc

2024-03-26 e9199a72d842cbda78ac614eee5db7cdaa6f2530

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label NanoPi Neo4 linux
  kernel /boot/Image
  devicetree /boot/rk3399-nanopi-neo4.dtb
  append earlycon=uart8250,mmio32,0xff1a0000 root=/dev/mmcblk1p1 rootwait