Update dependency react to v19

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | react   | 18.3.1 | 19.0.0 |


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

Author: renovate[bot]

package.json

@@ -19,7 +19,7 @@
     "@mdx-js/react": "^3.0.0",
     "clsx": "^2.0.0",
     "prism-react-renderer": "^2.3.0",
-    "react": "^18.0.0",
+    "react": "^19.0.0",
     "react-dom": "^18.0.0"
   },
   "devDependencies": {

yarn.lock

@@ -7488,12 +7488,10 @@ [email protected], react-router@^5.3.4:
     tiny-invariant "^1.0.2"
     tiny-warning "^1.0.0"
 
-react@^18.0.0:
-  version "18.3.1"
-  resolved "https://registry.yarnpkg.com/react/-/react-18.3.1.tgz#49ab892009c53933625bd16b2533fc754cab2891"
-  integrity sha512-wS+hAgJShR0KhEvPJArfuPVN1+Hz1t0Y6n5jLrGQbkb4urgPE/0Rve+1kMB1v/oWgHgm4WIcV+i7F2pTVj+2iQ==
-  dependencies:
-    loose-envify "^1.1.0"
+react@^19.0.0:
+  version "19.0.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-19.0.0.tgz#6e1969251b9f108870aa4bff37a0ce9ddfaaabdd"
+  integrity sha512-V8AVnmPIICiWpGfm6GLzCR/W5FXLchHop40W4nXBmdlEceh16rCN8O8LNWm5bh5XUX91fh7KpA+W0TgMKmgTpQ==
 
 readable-stream@^2.0.1:
   version "2.3.8"