Bump bootsnap from 1.18.3 to 1.18.4

[dependabot[bot]]

Bumps bootsnap from 1.18.3 to 1.18.4.

Changelog

Sourced from bootsnap's changelog.

1.18.4

• Allow using bootsnap without bundler. See #488.
• Fix startup failure if the cache directory points to a broken symlink.

Commits

• cae219a Release 1.18.4
• 407bdef Merge pull request #489 from Shopify/fix-load-error
• 7afa951 Fix bootsnap setup in environments without bundler
• c5513d9 Merge pull request #487 from Uaitt/update-gh-action-versions
• 65691ca Update GitHub actions versions
• 156b8c9 Merge pull request #485 from Uaitt/changelog-typo
• e76fe38 Merge pull request #486 from Uaitt/correct-rubocop-offenses
• 9ec8d70 Correct Rubocop offenses
• 47ad134 Correct a typo present in the CHANGELOG
• f627992 Add --version flag
• Additional commits viewable in compare view

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