Bump sass from 1.77.7 to 1.77.8 in /webapp

Bumps sass from 1.77.7 to 1.77.8.

Release notes

Sourced from sass's releases.

Dart Sass 1.77.8

To install Sass 1.77.8, download one of the packages below and add it to your PATH, or see the Sass website for full installation instructions.

Changes

• No user-visible changes.

See the full changelog for changes in earlier releases.

Changelog

Sourced from sass's changelog.

1.77.8

• No user-visible changes.

Commits

• be9c3ac Run Windows ARM64 releases on windows-latest instead (#2275)
• d4b1939 Run pub in verbose mode on windows-arm64
• c96b5e2 Fix windows-arm64 release (#2274)
• See full diff in compare view

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