[backport] #5998 fix: added match for new key in updater

[kushaldas]

Status

Ready for review

Description of Changes

Backport of #5998

Testing

• CI is green
• The commit is same from fix: added match for new key in updater #5998

Deployment

Any special considerations for deployment? Consider both:

1. Upgrading existing production instances.
2. New installs.

Checklist

If you made changes to the server application code:

• Linting (make lint) and tests (make test) pass in the development container

If you made changes to securedrop-admin:

• Linting and tests (make -C admin test) pass in the admin development container

If you made changes to the system configuration:

• Configuration tests pass

If you added or removed a file deployed with the application:

• I have updated AppArmor rules to include the change

If you made non-trivial code changes:

• I have written a test plan and validated it for this PR

Choose one of the following:

• I have opened a PR in the docs repo for these changes, or will do so later
• I would appreciate help with the documentation
• These changes do not require documentation

If you added or updated a code dependency:

Choose one of the following:

• I have performed a diff review and pasted the contents to the packaging wiki
• I would like someone else to do the diff review

[codecov-commenter]

Codecov Report

Merging #6001 (59d82df) into release/2.0.0 (2011565) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff               @@
##           release/2.0.0    #6001   +/-   ##
==============================================
  Coverage          85.12%   85.12%           
==============================================
  Files                 55       55           
  Lines               3865     3865           
  Branches             480      480           
==============================================
  Hits                3290     3290           
  Misses               463      463           
  Partials             112      112           

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[zenmonkeykstop]

LTGM, approving.