chore(examples) Update Gatsby Examples (#1975)

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

node/react/gatsby-themed-site/package.json

@@ -25,22 +25,22 @@
     "@jbolda/gatsby-theme-layout": "0.3.5",
     "@mdx-js/mdx": "3.1.1",
     "@mdx-js/react": "3.1.1",
-    "gatsby": "5.15.0",
+    "gatsby": "5.16.0",
     "gatsby-image": "3.11.0",
-    "gatsby-plugin-mdx": "5.15.0",
+    "gatsby-plugin-mdx": "5.16.0",
     "gatsby-plugin-netlify": "5.1.1",
-    "gatsby-plugin-react-helmet": "6.15.0",
-    "gatsby-plugin-sharp": "5.15.0",
+    "gatsby-plugin-react-helmet": "6.16.0",
+    "gatsby-plugin-sharp": "5.16.0",
     "gatsby-plugin-theme-ui": "0.17.4",
-    "gatsby-source-filesystem": "5.15.0",
-    "gatsby-transformer-sharp": "5.15.0",
-    "react": "19.2.3",
-    "react-dom": "19.2.3",
+    "gatsby-source-filesystem": "5.16.0",
+    "gatsby-transformer-sharp": "5.16.0",
+    "react": "19.2.4",
+    "react-dom": "19.2.4",
     "react-helmet": "6.1.0",
     "theme-ui": "0.17.4"
   },
   "devDependencies": {
     "@babel/plugin-proposal-optional-chaining": "7.21.0",
-    "babel-preset-gatsby": "3.15.0"
+    "babel-preset-gatsby": "3.16.0"
   }
 }