update .gitignore

hc

2024-03-26 e9199a72d842cbda78ac614eee5db7cdaa6f2530

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export RK_PACKAGE_FILE_AB=rk3588-package-file-ab
export RK_MISC=blank-misc.img
export RK_PARAMETER=parameter-ab.txt
export RK_CFG_RECOVERY=