Update dependency sass-loader to v15 (#997)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -70,7 +70,7 @@
 		"postcss-utilities": "0.8.4",
 		"postcss-watch-folder": "2.0.0",
 		"sass": "1.77.8",
-		"sass-loader": "14.2.1",
+		"sass-loader": "15.0.0",
 		"stylelint": "16.7.0",
 		"stylelint-config-recommended": "14.0.1",
 		"stylelint-config-standard-scss": "13.1.0",

yarn.lock

@@ -7590,10 +7590,10 @@ sanitize.css@*:
   resolved "https://registry.yarnpkg.com/sanitize.css/-/sanitize.css-13.0.0.tgz#2675553974b27964c75562ade3bd85d79879f173"
   integrity sha512-ZRwKbh/eQ6w9vmTjkuG0Ioi3HBwPFce0O+v//ve+aOq1oeCy7jMV2qzzAlpsNuqpqCBjjriM1lbtZbF/Q8jVyA==
 
-sass-loader@14.2.1:
-  version "14.2.1"
-  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-14.2.1.tgz#db9ad96b56dc1c1ea546101e76375d5b008fec70"
-  integrity sha512-G0VcnMYU18a4N7VoNDegg2OuMjYtxnqzQWARVWCIVSZwJeiL9kg8QMsuIZOplsJgTzZLF6jGxI3AClj8I9nRdQ==
+sass-loader@15.0.0:
+  version "15.0.0"
+  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-15.0.0.tgz#a883fda2b70c27d4a49835057da6b8d8564a419d"
+  integrity sha512-mbXAL7sI/fgt3skXR6xHxtKkaGyxRrGf7zrU4hLLWxBDJEcAe0QsoNy92qKttCb3zfMniTkU2kD9yakUKtW7vQ==
   dependencies:
     neo-async "^2.6.2"