chore: Add candis.io to USERS.md

[parabolic]

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Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• The title of the PR conforms to the Toolchain Guide
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
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• My new feature complies with the feature status guidelines.
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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (42bdb5a) 49.19% compared to head (409f976) 49.20%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13504   +/-   ##
=======================================
  Coverage   49.19%   49.20%           
=======================================
  Files         248      248           
  Lines       42908    42908           
=======================================
+ Hits        21109    21112    +3     
+ Misses      19684    19682    -2     
+ Partials     2115     2114    -1     

see 2 files with indirect coverage changes

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