chore(deps): update dependency sinon to v21 (#2203)

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

Author: renovate[bot]

package.json

@@ -81,7 +81,7 @@
     "nodemon": "3.1.10",
     "nyc": "17.1.0",
     "sass-embedded": "1.89.0",
-    "sinon": "20.0.0",
+    "sinon": "21.0.0",
     "standard": "17.1.2",
     "vite": "6.3.5",
     "vite-plugin-eslint": "1.8.1",

yarn.lock

@@ -4341,7 +4341,7 @@ __metadata:
     preact: "npm:10.26.9"
     sass-embedded: "npm:1.89.0"
     simple-icons: "npm:15.1.0"
-    sinon: "npm:20.0.0"
+    sinon: "npm:21.0.0"
     standard: "npm:17.1.2"
     subscriptions-transport-ws: "npm:0.11.0"
     svg-pan-zoom: "npm:3.6.2"
@@ -10097,16 +10097,16 @@ __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": "npm:^3.0.1"
     "@sinonjs/fake-timers": "npm:^13.0.5"
     "@sinonjs/samsam": "npm:^8.0.1"
     diff: "npm:^7.0.0"
     supports-color: "npm:^7.2.0"
-  checksum: 10c0/98198e9608f9844a00d2dc733bc8d75cfd1826b2214ed07bbfcd05cdfa24eb0ac0866be116079febd9f20c715a41fe62db62f70961f941750b24281c97f04136
+  checksum: 10c0/4a60ef1e2685b716232a30dfea22bf62c0a8a8c9904a3cb053f30794cc2a3bbd470f0e615fe8d8f4424e9af48b3a9f8cb67f07eabeb9fb7b8ed50bd0f5f50dd9
   languageName: node
   linkType: hard