add riysaxen as maintainer

[riysaxen-amzn]

Description

• Add riysaxen-amzn as a maintainer to dashboards-notifications repo

Issues Resolved

[List any issues this PR will resolve]

Check List

• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[riysaxen-amzn]

UTs passing locally:

 PASS  public/pages/Channels/__tests__/ChannelSettingsDetails.test.tsx (22.27 s)
 PASS  public/pages/Emails/__tests__/SendersTable.test.tsx (28.032 s)
 PASS  public/pages/Main/__tests__/Main.test.tsx (24.408 s)
 PASS  server/utils/__tests__/helper.test.ts (6.659 s)
 PASS  public/pages/CreateChannel/__tests__/CreateRecipientGroupModal.test.tsx (26.883 s)
 PASS  public/utils/__tests__/helper.test.ts
 PASS  public/components/__tests__/ContentPanel.test.tsx (18.595 s)
 PASS  public/components/__tests__/ContentPanelActions.test.tsx (18.564 s)
 PASS  public/pages/Emails/__tests__/EmailGroups.test.tsx (19.163 s)
 PASS  public/pages/Channels/__tests__/DetailsTableModal.test.tsx (20.653 s)
 PASS  public/pages/Channels/__tests__/DetailsListModal.test.tsx (13.826 s)
A worker process has failed to exit gracefully and has been force exited. This is likely caused by tests leaking due to improper teardown. Try running with --detectOpenHandles to find leaks. Active timers can also cause this, ensure that .unref() was called on them.

Test Suites: 45 passed, 45 total
Tests:       3 skipped, 146 passed, 149 total
Snapshots:   83 passed, 83 total
Time:        361.117 s
Ran all test suites.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/dashboards-notifications/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/dashboards-notifications/backport-2.x
# Create a new branch
git switch --create backport/backport-240-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 0bad4889c457176bc57a93b2fa8c953d4ef1693f
# Push it to GitHub
git push --set-upstream origin backport/backport-240-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/dashboards-notifications/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-240-to-2.x.