Environment Variables: Rename `encrypted` to `secret`

[khamilowicz]

Why

Encrypted variables were renamed to secret, but it was omitted in a couple places.

Test Plan

Updated tests, tested manually

[github-actions[bot]]

Subscribed to pull request	File Patterns	Mentions
**/*	@szdziedzic, @sjchmiela

Generated by CodeMention

[github-actions[bot]]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.

[github-actions[bot]]

Size Change: -2.01 kB (0%)

Total Size: 52.9 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	52.9 MB	-2.01 kB (0%)

_{compressed-size-action}

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 52.76%. Comparing base (3111492) to head (c061d35). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2709 +/- ## ======================================= Coverage 52.76% 52.76% ======================================= Files 579 579 Lines 22187 22187 Branches 4339 4339 ======================================= Hits 11705 11705 Misses 10448 10448 Partials 34 34 ```

:umbrella: View full report in Codecov by Sentry.
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