fix: update react-toastify for React 19 compatibility

[choejwoo]

Related to argoproj/argo-cd#28749

Update react-toastify from v9.0.3 to v11.1.0 for React 19 compatibility.

React Toastify v9 relies on function component defaultProps, which are not applied when using React 19 with the automatic JSX runtime. This causes transition to be undefined and crashes the UI whenever a toast is rendered.

This also replaces the removed toast.POSITION.BOTTOM_RIGHT constant with the equivalent bottom-right position value.

After this PR is merged, I will update the argo-ui commit referenced by Argo CD and align its direct react-toastify dependency with v11 in a follow-up PR.

[Copilot]

Pull request overview

Updates react-toastify to a React 19–compatible version and adjusts notification code to match the updated library API, preventing toast rendering crashes under React 19 + automatic JSX runtime.

Changes:

• Bump react-toastify from 9.0.3 to 11.1.0.
• Replace toast.POSITION.BOTTOM_RIGHT with the equivalent string value 'bottom-right'.
• Update pnpm-lock.yaml to reflect the dependency upgrade (including updated transitive deps like clsx).

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
src/components/notifications/notifications.tsx	Updates toast position configuration to the v11-compatible string value.
package.json	Bumps react-toastify to 11.1.0.
pnpm-lock.yaml	Locks the new react-toastify version and updated transitive dependency graph.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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[blakepettersson]

LGTM