Add GH_TOKEN to release workflow #877

Job	Run time
clippy_format	1m 51s
build_wasm (nightly)	46s
build_bin_spec (nightly)	1m 5s
build_wasm (beta)	48s
build_lib_test (nightly)	46s
build_bin_spec (beta)	1m 3s
lockfile	58s
build_wasm (stable)	37s
build_lib_test (beta)	1m 5s
build_bin_spec (stable)	1m 0s
build_wasm ($MSRV)	1m 59s
build_lib_test (stable)	1m 8s
build_bin_spec ($MSRV)	2m 18s
build_lib_test ($MSRV)	2m 29s
no_features_build_test (nightly)	25s
no_features_build_test (beta)	26s
no_features_build_test (stable)	34s
no_features_build_test ($MSRV)	1m 46s
	21m 4s

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