docs: Add Amadeus to Users.md

[OpenGuidou]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[github-actions]

Go Published Test Results

2 160 tests   2 160 ✅  2m 53s ⏱️
  119 suites      0 💤
    1 files        0 ❌

Results for commit 0ffb4dd.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.21%. Comparing base (8405f2e) to head (0ffb4dd).
Report is 92 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3527      +/-   ##
==========================================
- Coverage   81.83%   78.21%   -3.63%     
==========================================
  Files         135      158      +23     
  Lines       20688    18397    -2291     
==========================================
- Hits        16931    14389    -2542     
- Misses       2883     3101     +218     
- Partials      874      907      +33     

☔ View full report in Codecov by Sentry.
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[github-actions]

E2E Tests Published Test Results

  4 files    4 suites   3h 25m 40s ⏱️
110 tests  97 ✅  6 💤  7 ❌
450 runs  416 ✅ 24 💤 10 ❌

For more details on these failures, see this check.

Results for commit 0ffb4dd.

[wherka-ama]

Hello,
please note the PR is blessed by the Amadeus OSPO who I'm representing here.

@OpenGuidou : thank you very much for your contribution to Argo Project and to Open Source in general. We really proud of you ❤️

I would also express my gratitude to the Argo Project community for a stellar work on such an important area! We truly commend you for that.
we'll try to be supportive of your efforts in a way of direct contributions(like these submitted by @OpenGuidou and other employees of our company) and by other means - the feedback and some internal sessions designed to spread the good word about the tooling provided by this community.

Feel free to reach out to me if you are interested in speaking to our engineering community - hundreds(conservative estimate) of fantastic engineers eager to learn about technology. I would be happy to facilitate it :)

Cheers,
Waldek(Amadeus OSPO)

[wherka-ama]

Hello,
I'm acting as an Amadeus OSPO here and I'm more than happy to see our beloved company on this list :-)

/LGTM