Rust

ci: change MSRV to 1.63.0 #298

Job	Run time
build-test (stable, true, default)	1m 46s
build-test (stable, true, blocking)	2m 44s
build-test (stable, true, async)	1m 23s
build-test (stable, true, async-https)	1m 28s
build-test (stable, true, async-https-native)	1m 38s
build-test (stable, true, async-https-rustls)	1m 21s
build-test (stable, true, async-https-rustls-manual-roots)	1m 24s
build-test (1.63.0, default)	3m 3s
build-test (1.63.0, blocking)	2m 30s
build-test (1.63.0, async)	2m 41s
build-test (1.63.0, async-https)	2m 39s
build-test (1.63.0, async-https-native)	2m 51s
build-test (1.63.0, async-https-rustls)	3m 10s
build-test (1.63.0, async-https-rustls-manual-roots)	2m 43s
	31m 21s

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