.github: include license file in tarballs #47

Job	Run time
supervisor (curios-ntpd) / build (amd64)	4m 0s
supervisor (curios-nftables) / build (amd64)	1m 39s
supervisor (curios-httpd) / build (amd64)	2m 29s
supervisor (curios) / build (amd64)	10m 35s
supervisor (curios-nftables) / build (arm64)	1m 33s
supervisor (curios-httpd) / build (arm64)	2m 47s
supervisor (curios) / build (arm64)	10m 52s
supervisor (curios-ntpd) / build (arm64)	4m 5s
supervisor (curios-nftables) / push	9s
supervisor (curios-httpd) / push	24s
supervisor (curios-ntpd) / push	18s
supervisor (curios) / push	25s
	39m 16s

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