Bump sinon from 20.0.0 to 21.0.0

Bumps [sinon](https://github.com/sinonjs/sinon) from 20.0.0 to 21.0.0.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/main/docs/changelog.md)
- [Commits](https://github.com/sinonjs/sinon/commits)

---
updated-dependencies:
- dependency-name: sinon
  dependency-version: 21.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -85,7 +85,7 @@
     "rollup": "^4.42.0",
     "sass": "^1.89.1",
     "showdown": "^2.0.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "tailwindcss": "^3.0.2",
     "typescript": "^5.0.2",
     "typescript-eslint": "^8.10.0",

yarn.lock

@@ -1686,7 +1686,7 @@ __metadata:
     rollup: ^4.42.0
     sass: ^1.89.1
     showdown: ^2.0.0
-    sinon: ^20.0.0
+    sinon: ^21.0.0
     tailwindcss: ^3.0.2
     typescript: ^5.0.2
     typescript-eslint: ^8.10.0
@@ -7846,16 +7846,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"sinon@npm:^20.0.0":
-  version: 20.0.0
-  resolution: "sinon@npm:20.0.0"
+"sinon@npm:^21.0.0":
+  version: 21.0.0
+  resolution: "sinon@npm:21.0.0"
   dependencies:
     "@sinonjs/commons": ^3.0.1
     "@sinonjs/fake-timers": ^13.0.5
     "@sinonjs/samsam": ^8.0.1
     diff: ^7.0.0
     supports-color: ^7.2.0
-  checksum: c6dcd3bc60aa360fede157fbed30c3984eb222990ff28f3014a5e31834cec74e5203c0575332a99c3f7976425167f70e0777507c0c58867473ad0a0c4c1a759c
+  checksum: 09fd1b8ca981592dd31cac56deaf9abbde3b767d04523fc91b7fa8efd0bd49e1cde71c012aa309a6b6e9cd689be58e3d6f2d0b37db8fd67612cd894cd96eaeb1
   languageName: node
   linkType: hard