Pin react deps to exact version in package.json

Yarn had somehow confused itself and got into a state where it refused
to install react 19.2.4, so much so that even renovate thought it had
upgraded the package (https://github.com/element-hq/element-modules/pull/208)
when it hadn't.

Until we switch to pnom and can use catalog:, pin them to exact version which
seems to make yarn play ball again.

modules/banner/element-web/package.json

@@ -17,7 +17,7 @@
         "@types/node": "^22.10.7",
         "@types/react": "^19",
         "@vitejs/plugin-react": "^5.0.0",
-        "react": "^19",
+        "react": "19.2.4",
         "rollup-plugin-external-globals": "^0.13.0",
         "typescript": "^5.7.3",
         "vite": "^7.1.11",

modules/opendesk/element-web/package.json

@@ -22,8 +22,8 @@
         "@types/node": "^22.10.7",
         "@types/react": "^19",
         "@vitejs/plugin-react": "^5.0.0",
-        "react": "^19",
-        "react-dom": "^19",
+        "react": "19.2.4",
+        "react-dom": "19.2.4",
         "rollup-plugin-external-globals": "^0.13.0",
         "typescript": "^5.7.3",
         "vite": "^7.1.11",

modules/restricted-guests/element-web/package.json

@@ -17,7 +17,7 @@
         "@types/node": "^22.10.7",
         "@types/react": "^19",
         "@vitejs/plugin-react": "^5.0.0",
-        "react": "^19",
+        "react": "19.2.4",
         "rollup-plugin-external-globals": "^0.13.0",
         "typescript": "^5.7.3",
         "vite": "^7.1.11",