Bump react-is from 18.3.1 to 19.1.0

Bumps [react-is](https://github.com/facebook/react/tree/HEAD/packages/react-is) from 18.3.1 to 19.1.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.1.0/packages/react-is)

---
updated-dependencies:
- dependency-name: react-is
  dependency-version: 19.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
         "@primer/react": "^36.27.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
-        "react-is": "^18.3.1",
+        "react-is": "^19.1.0",
         "react-router-dom": "^7.6.0",
         "styled-components": "^5.3.11",
         "web-vitals": "^4.2.4"

package.json

@@ -3494,11 +3494,16 @@ react-is@^16.13.1, react-is@^16.7.0:
   resolved "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz"
   integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==
 
-react-is@^18.0.0, react-is@^18.2.0, react-is@^18.3.1:
+react-is@^18.0.0, react-is@^18.2.0:
   version "18.3.1"
   resolved "https://registry.npmjs.org/react-is/-/react-is-18.3.1.tgz"
   integrity sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg==
 
+react-is@^19.1.0:
+  version "19.1.0"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-19.1.0.tgz#805bce321546b7e14c084989c77022351bbdd11b"
+  integrity sha512-Oe56aUPnkHyyDxxkvqtd7KkdQP5uIUfHxd5XTb3wE9d/kRnZLmKbDB0GWk919tdQ+mxxPtG6EAs6RMT6i1qtHg==
+
 react-markdown@8.0.7:
   version "8.0.7"
   resolved "https://registry.npmjs.org/react-markdown/-/react-markdown-8.0.7.tgz"