fix(ci): downgrade mac-notification-sys to 0.6.1 #321

Job	Run time
msrv-list (core, --manifest-path=./Cargo.toml --features tracing,compression,wry,linux-protocol-h...	9m 4s
msrv-list (core, --manifest-path=./Cargo.toml --features tracing,compression,wry,linux-protocol-h...	5m 45s
msrv-list (core, --manifest-path=./Cargo.toml --features tracing,compression,wry,linux-protocol-h...	6m 1s
msrv-list (bundler, --manifest-path=./tooling/bundler/Cargo.toml, 1.71.0, x86_64-pc-windows-msvc,...	5m 6s
msrv-list (bundler, --manifest-path=./tooling/bundler/Cargo.toml, 1.71.0, x86_64-unknown-linux-gn...	2m 1s
msrv-list (bundler, --manifest-path=./tooling/bundler/Cargo.toml, 1.71.0, x86_64-apple-darwin, ma...	3m 28s
msrv-list (cli, --manifest-path=./tooling/cli/Cargo.toml, 1.71.0, x86_64-pc-windows-msvc, windows...	4m 50s
msrv-list (cli, --manifest-path=./tooling/cli/Cargo.toml, 1.71.0, x86_64-unknown-linux-gnu, ubunt...	2m 13s
msrv-list (cli, --manifest-path=./tooling/cli/Cargo.toml, 1.71.0, x86_64-apple-darwin, macos-13, ...	3m 19s
run-integration-tests (ubuntu-latest)	11m 46s
run-integration-tests (macos-13)	8m 34s
run-integration-tests (windows-latest)	1h 0m 7s
version-or-publish	1s
	2h 2m 15s

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