Per merge CI

Add README blurb for ulimit increase for MacOS #1152

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2 errors and 3 warnings

Error: ENOENT: no such file or directory, opendir '/home/runner/work/sdk-core/sdk-core/target/tests/target'

ENOENT: no such file or directory, opendir '/home/runner/work/sdk-core/sdk-core/target/tests/target'

No files were found with the provided path: machine_coverage/. No artifacts will be uploaded.

No files were found with the provided path: tarpaulin-report.html. No artifacts will be uploaded.

Cache not found for keys: v0-rust-test-Linux-x64-3bcebdd4-c73a2094, v0-rust-test-Linux-x64-3bcebdd4