add react 19 to plugin peer dependencies (#1074)

Author: sserrata

packages/docusaurus-plugin-openapi-docs/package.json

@@ -60,7 +60,7 @@
     "@docusaurus/plugin-content-docs": "^3.5.0",
     "@docusaurus/utils": "^3.5.0",
     "@docusaurus/utils-validation": "^3.5.0",
-    "react": "^16.8.4 || ^17.0.0 || ^18.0.0"
+    "react": "^16.8.4 || ^17.0.0 || ^18.0.0 || ^19.0.0"
   },
   "engines": {
     "node": ">=14"