update codecov action to fix gpg missing error

[petrelharp]

From https://status.codecov.com/ :

[Codecov uploaders (Action/Orb/Step) fail gpg verification](https://status.codecov.com/incidents/3tyvhnpyxnk8)
Resolved - On Saturday, June 6th, the Codecov gpg public key located at keybase.io/codecovsecurity was absent. This caused widespread outages for users uploading with the Codecov
- GitHub Action
- CircleCI Orb
- Bitrise Step

In order to quickly move and prevent further outages, the Codecov team deleted the `codecovsecurity` account and created `codecovsecops` with the same public gpg key. This key can be verified against any pre-existing CLI to prove it is the same key and also at about.codecov.io/security. The key location was updated in all of the above uploaders on the latest versions.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.82%. Comparing base (9f04579) to head (9774d2c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1853   +/-   ##
=======================================
  Coverage   99.82%   99.82%           
=======================================
  Files         143      143           
  Lines        5030     5030           
  Branches      515      515           
=======================================
  Hits         5021     5021           
  Misses          6        6           
  Partials        3        3           

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