Update dependency sass-loader to v15

This MR contains the following updates:

Package	Type	Update	Change
sass-loader	devDependencies	major	14.2.1 -> 15.0.0

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Release Notes

webpack-contrib/sass-loader (sass-loader)

v15.0.0

Compare Source

⚠ BREAKING CHANGES

• prefer sass-embedded over sass by default (#​1211)

Features

• prefer sass-embedded over sass by default (#​1211) (83423ff)

14.2.1 (2024-04-16)

Bug Fixes

• avoid multiple sass compiler creation (#​1199) (77051d8)

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