chore(deps): pin @tailwindcss/vite to 4.1.18

Author: renovate[bot]

package.json

@@ -92,7 +92,7 @@
     "@primer/octicons-react": "19.22.0",
     "@primer/react": "38.11.0",
     "@swc-contrib/plugin-graphql-codegen-client-preset": "0.17.0",
-    "@tailwindcss/vite": "^4.1.18",
+    "@tailwindcss/vite": "4.1.18",
     "@testing-library/jest-dom": "6.9.1",
     "@testing-library/react": "16.3.2",
     "@testing-library/user-event": "14.6.1",