Try to fix github ci #243

Job	Run time
clippy (ubuntu-latest)	45s
cross (beta, aarch64-unknown-linux-gnu)	2m 4s
clippy (windows-latest)	1m 36s
examples (beta, run-app)	1m 15s
cross (beta, armv7-unknown-linux-gnueabihf)	1m 58s
documentation (ubuntu-latest)	1m 31s
examples (beta, run-app-with-args)	52s
documentation (windows-latest)	3m 51s
cross (beta, aarch64-pc-windows-msvc)	1m 5s
examples (beta, call-managed-function)	52s
fmt (ubuntu-latest)	13s
examples (beta, passing-parameters)	2m 19s
fmt (windows-latest)	21s
examples (beta, return-string-from-managed)	59s
test (beta, x86_64-unknown-linux-gnu, 6.0)	2m 34s
test (beta, x86_64-unknown-linux-gnu, 7.0)	2m 41s
test (beta, x86_64-unknown-linux-gnu, 8.0)	2m 42s
test (beta, x86_64-pc-windows-msvc, 6.0)	5m 38s
test (beta, x86_64-pc-windows-msvc, 7.0)	5m 38s
test (beta, x86_64-pc-windows-msvc, 8.0)	5m 33s
test (beta, i686-pc-windows-msvc, 6.0)	6m 2s
test (beta, i686-pc-windows-msvc, 7.0)	6m 3s
test (beta, i686-pc-windows-msvc, 8.0)	5m 36s
test (beta, x86_64-apple-darwin, 6.0)	6m 52s
test (beta, x86_64-apple-darwin, 7.0)	5m 19s
test (beta, x86_64-apple-darwin, 8.0)	9m 3s
	1h 23m 22s

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