Bump yaml from 1.10.2 to 2.1.1

Bumps [yaml](https://github.com/eemeli/yaml) from 1.10.2 to 2.1.1.
- [Release notes](https://github.com/eemeli/yaml/releases)
- [Commits](https://github.com/eemeli/yaml/compare/v1.10.2...v2.1.1)

---
updated-dependencies:
- dependency-name: yaml
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

sites/backend/package.json

@@ -85,7 +85,7 @@
     "rimraf": "2.6.2",
     "sharp": "^0.31.0",
     "tlds": "^1.221.1",
-    "yaml": "^1.10.2"
+    "yaml": "^2.1.1"
   },
   "devDependencies": {
     "backpack-core": "0.8.4",

yarn.lock

@@ -8077,15 +8077,6 @@ espree@^9.0.0, espree@^9.4.0:
     acorn-jsx "^5.3.2"
     eslint-visitor-keys "^3.3.0"
 
-espree@^9.3.2:
-  version "9.3.2"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-9.3.2.tgz#f58f77bd334731182801ced3380a8cc859091596"
-  integrity sha512-D211tC7ZwouTIuY5x9XnS0E9sWNChB7IYKX/Xp5eQj3nFXhqmiUDB9q27y76oFl8jTg3pXcQx/bpxMfs3CIZbA==
-  dependencies:
-    acorn "^8.7.1"
-    acorn-jsx "^5.3.2"
-    eslint-visitor-keys "^3.3.0"
-
 esprima@^4.0.0, esprima@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"