fix: Pin yarn version

- The build is not working with `yarn@berry`
- This change pins the version down to `v1.x`
- Assumes usage of `volta`, but also makes the fact self-documenting

Fixes #279

Author: MichalBryxi

package.json

@@ -31,5 +31,9 @@
     "eslint": "8.40.0",
     "eslint-config-next": "^13.4.2",
     "eslint-config-sznm": "^1.1.1"
+  },
+  "volta": {
+    "node": "18.16.0",
+    "yarn": "1.22.19"
   }
 }