Fix missing quotes around $usage in release.sh

[mdqst]

Description:

This pull request addresses an issue in the release.sh script where the echo $usage command is not enclosed in quotes:

if [ ! -d "$brewdir" ]; then echo "Missing/invalid homebrew-pact dir"; echo $usage; exit 1; fi

The Issue:

When $usage is expanded without quotes, it can lead to unexpected behavior if the variable contains special characters, spaces, or line breaks. For example:

• Spaces can cause echo to break the text into unintended multiple arguments.
• Special characters can trigger unexpected shell behavior, making the output unreliable.

The Fix:

The corrected line ensures $usage is properly quoted to handle any content safely:

if [ ! -d "$brewdir" ]; then echo "Missing/invalid homebrew-pact dir"; echo "$usage"; exit 1; fi

Importance:

This fix ensures:

1. Robustness: The script will behave as expected regardless of the content in $usage.
2. Readability: Consistent use of quoting for variables in shell scripts improves maintainability and prevents subtle bugs.
3. Preventive Maintenance: While $usage may currently contain simple text, future updates to the script could inadvertently introduce complex or multi-line content. This fix preemptively avoids potential issues.

PR checklist:

• Test coverage for the proposed changes
• PR description contains example output from repl interaction or a snippet from unit test output
• New builtins have a FV translation
• Documentation has been (manually) updated at https://docs.kadena.io/pact
• Any changes that could be relevant to users have been recorded in the changelog
• In case of changes to the Pact trace output (pact -t), make sure pact-lsp is in sync.

Additionally, please justify why you should or should not do the following:

• Confirm replay/back compat
• Benchmark regressions
• (For Kadena engineers) Run integration-tests against a Chainweb built with this version of Pact