security: bump solid-js to ^1.9.4 in SolidStart apps

Addresses XSS in JSX fragments (GHSA-3qxh-p7jc-5xh6) for the example and
integration test SolidStart applications.

Made-with: Cursor

Author: thomasrockhu-codecov

examples/solidstart/package.json

@@ -12,7 +12,7 @@
     "@solidjs/meta": "^0.29.4",
     "@solidjs/router": "^0.14.1",
     "@solidjs/start": "^1.0.10",
-    "solid-js": "^1.8.18",
+    "solid-js": "^1.9.4",
     "vinxi": "^0.4.3",
     "vite-plugin-solid": "^2.11.0"
   },

integration-tests/test-apps/solidstart/package.json

@@ -11,7 +11,7 @@
     "@solidjs/meta": "^0.29.4",
     "@solidjs/router": "^0.14.1",
     "@solidjs/start": "^1.0.10",
-    "solid-js": "^1.8.18",
+    "solid-js": "^1.9.4",
     "vinxi": "^0.4.3",
     "vite-plugin-solid": "^2.11.0"
   },