internal: bump node version to get ovsx to work in ci (#592)

Author: sbdchd

package.json

@@ -32,6 +32,6 @@
     "node-fetch": "^2.6.0"
   },
   "volta": {
-    "node": "18.15.0"
+    "node": "20.18.0"
   }
 }

squawk-vscode/package.json

@@ -138,7 +138,7 @@
     "typescript-eslint": "^8.35.0"
   },
   "volta": {
-    "node": "18.7.0",
+    "node": "20.18.0",
     "pnpm": "8.15.8"
   },
   "dependencies": {