bump version to v0.8.6 #478

Job	Run time
Linux	33m 51s
MacOS	16m 59s
Build Docker Image	46s
OpenWrt (aarch64_generic, https://downloads.openwrt.org/releases/22.03.2/targets/rockchip/armv8/o...	3m 38s
OpenWrt (aarch64_cortex-a53, https://downloads.openwrt.org/releases/22.03.2/targets/bcm27xx/bcm27...	3m 47s
OpenWrt (aarch64_cortex-a72, https://downloads.openwrt.org/releases/22.03.2/targets/bcm27xx/bcm27...	3m 45s
OpenWrt (x86_64, https://downloads.openwrt.org/releases/18.06.9/targets/x86/64/openwrt-sdk-18.06....	2m 56s
OpenWrt (arm_cortex-a9, https://downloads.openwrt.org/releases/22.03.2/targets/bcm53xx/generic/op...	4m 3s
OpenWrt (arm_mpcore, https://downloads.openwrt.org/releases/22.03.2/targets/oxnas/ox820/openwrt-s...	3m 46s
OpenWrt (arm_cortex-a5_vfpv4, https://downloads.openwrt.org/releases/22.03.2/targets/at91/sama5/o...	3m 13s
OpenWrt (arm_cortex-a7_neon-vfpv4, https://downloads.openwrt.org/releases/22.03.2/targets/ipq40xx...	3m 44s
	1h 20m 28s

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