chore: upgrade matrix-js-sdk and react-google-recaptcha

- matrix-js-sdk 41.5.0 → 41.6.0-rc.0
- react-google-recaptcha 2.1.0 → 3.1.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -102,7 +102,7 @@
     "linkify-react": "4.3.3",
     "linkifyjs": "4.3.3",
     "lodash": "4.18.1",
-    "matrix-js-sdk": "41.5.0",
+    "matrix-js-sdk": "41.6.0-rc.0",
     "matrix-widget-api": "1.17.0",
     "millify": "6.1.0",
     "pdfjs-dist": "5.7.284",
@@ -113,7 +113,7 @@
     "react-colorful": "5.7.0",
     "react-dom": "18.2.0",
     "react-error-boundary": "6.1.1",
-    "react-google-recaptcha": "2.1.0",
+    "react-google-recaptcha": "3.1.0",
     "react-i18next": "17.0.8",
     "react-range": "1.10.0",
     "react-router-dom": "7.15.1",