chore(deps): update yarn to v4.12.0

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

.yarnrc.yml

@@ -1,3 +1,3 @@
 nodeLinker: node-modules
 
-yarnPath: .yarn/releases/yarn-4.5.3.cjs
+yarnPath: .yarn/releases/yarn-4.12.0.cjs

backend/package.json

@@ -138,5 +138,5 @@
       "github-actions"
     ]
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

commons/package.json

@@ -67,5 +67,5 @@
     "ts-jest": "29.4.6",
     "typescript": "5.6.3"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

database/package.json

@@ -43,5 +43,5 @@
     "prettier": "3.7.4",
     "typescript": "5.6.3"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

docs/package.json

@@ -9,5 +9,5 @@
   "devDependencies": {
     "markdownlint-cli2": "0.20.0"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

frontend/package.json

@@ -166,5 +166,5 @@
     "typescript": "5.6.3",
     "user-agent-data-types": "0.4.2"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

html-to-react/package.json

@@ -85,5 +85,5 @@
   "resolutions": {
     "@types/react": "18.3.27"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

markdown-it-plugins/package.json

@@ -129,5 +129,5 @@
   "bugs": {
     "url": "https://github.com/hedgedoc/hedgedoc/issues"
   },
-  "packageManager": "yarn@4.5.3"
+  "packageManager": "yarn@4.12.0"
 }

package.json

@@ -24,7 +24,7 @@
     "test": "dotenv -c test -- turbo run test --concurrency 1",
     "test:e2e:ci": "dotenv -c test -- turbo run test:e2e:ci"
   },
-  "packageManager": "yarn@4.5.3",
+  "packageManager": "yarn@4.12.0",
   "resolutions": {
     "@types/node": "20.19.26",
     "domhandler": "5.0.3",