github-action: use ephemeral tokens with the required permissions (#1… #72

Job	Run time
release-started	0s
generate-test-packages-matrix	0s
build / setup-build-matrix / setup-build-matrix	1s
build / build-agent-library (linux-x86-64)	5m 30s
build / build-agent-library (linuxmusl-x86-64)	4m 56s
build / build-agent-library (linux-arm64, 1)	41m 24s
build / build-agent-library (linuxmusl-arm64, 1)	42m 24s
build-packages / build-packages (x86-64)	37s
build-packages / build-packages (arm64)	34s
sign	1m 43s
test-packages	0s
release	0s
notify	5s
	1h 37m 14s

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