chore(deps): update @testing-library/react to v16.3.0 (#1937)

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

Author: renovate[bot]

package.json

@@ -84,7 +84,7 @@
     "@primer/primitives": "10.5.0",
     "@primer/react": "36.27.0",
     "@tailwindcss/postcss": "4.1.1",
-    "@testing-library/react": "16.2.0",
+    "@testing-library/react": "16.3.0",
     "@types/jest": "29.5.14",
     "@types/node": "22.14.0",
     "@types/react": "19.1.0",