Bump sass from 1.50.1 to 1.51.0 in /web

Bumps [sass](https://github.com/sass/dart-sass) from 1.50.1 to 1.51.0.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.50.1...1.51.0)

---
updated-dependencies:
- dependency-name: sass
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

web/package.json

@@ -88,7 +88,7 @@
     "postcss-loader": "^3.0.0",
     "prettier": "^2.5.1",
     "readline-sync": "^1.4.9",
-    "sass": "^1.50.1",
+    "sass": "^1.51.0",
     "sass-loader": "^8.0.0",
     "shapefile": "^0.6.2",
     "snowpack": "^3.8.8",

web/yarn.lock

@@ -10617,19 +10617,10 @@ sass-loader@^8.0.0:
     schema-utils "^2.1.0"
     semver "^6.3.0"
 
-sass@^1.3.0:
-  version "1.49.9"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.49.9.tgz#b15a189ecb0ca9e24634bae5d1ebc191809712f9"
-  integrity sha512-YlYWkkHP9fbwaFRZQRXgDi3mXZShslVmmo+FVK3kHLUELHHEYrCmL1x6IUjC7wLS6VuJSAFXRQS/DxdsC4xL1A==
-  dependencies:
-    chokidar ">=3.0.0 <4.0.0"
-    immutable "^4.0.0"
-    source-map-js ">=0.6.2 <2.0.0"
-
-sass@^1.50.1:
-  version "1.50.1"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.50.1.tgz#e9b078a1748863013c4712d2466ce8ca4e4ed292"
-  integrity sha512-noTnY41KnlW2A9P8sdwESpDmo+KBNkukI1i8+hOK3footBUcohNHtdOJbckp46XO95nuvcHDDZ+4tmOnpK3hjw==
+sass@^1.3.0, sass@^1.51.0:
+  version "1.51.0"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.51.0.tgz#25ea36cf819581fe1fe8329e8c3a4eaaf70d2845"
+  integrity sha512-haGdpTgywJTvHC2b91GSq+clTKGbtkkZmVAb82jZQN/wTy6qs8DdFm2lhEQbEwrY0QDRgSQ3xDurqM977C3noA==
   dependencies:
     chokidar ">=3.0.0 <4.0.0"
     immutable "^4.0.0"