chore(docs): Update README and package file to include info on React 17

Author: rebeccaalpert

README.md

@@ -16,8 +16,11 @@ Make sure to add the CSS imports as the last import in your index file. The exte
 
 ```
 import '@patternfly/chatbot/dist/css/main.css';
+
 ```
 
+If you are using React 17, ChatBot currently has a dependency on [react-markdown](https://github.com/remarkjs/react-markdown) that relies on React 18 and 19. There is an older version of react-markdown that supports 17, but it does not have support for 19. You should be able to add `"react"` and `"react-dom"` of the appropriate version to the `overrides` section of your `package.json` file if you need to use ChatBot with 17.
+
 ## Contribution guide
 
 ### AI-assisted development guidelines

packages/module/package.json

@@ -50,8 +50,8 @@
     "unist-util-visit": "^5.0.0"
   },
   "peerDependencies": {
-    "react": "^17 || ^18 || ^19",
-    "react-dom": "^17 || ^18 || ^19"
+    "react": "^18 || ^19",
+    "react-dom": "^18 || ^19"
   },
   "devDependencies": {
     "@patternfly/documentation-framework": "6.16.0",