Improve wording in env:pull command

[khamilowicz]

Why

ENG-13928: Update "secret" with "encrypted" on eas env:pull

The message informing user about encrypted variables omission can be clearer.

Test Plan

Please describe how you tested this change and how a reviewer could reproduce your test, especially if this PR does not include automated tests! If possible, please also provide terminal output and/or screenshots demonstrating your test/reproduction.

[linear]

ENG-13928 Update "secret" with "encrypted" on eas env:pull

[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@szdziedzic, @sjchmiela

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[github-actions]

Size Change: -483 B (0%)

Total Size: 53 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	53 MB	-483 B (0%)

_{compressed-size-action}

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 52.91%. Comparing base (5478814) to head (67ce5d2).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/eas-cli/src/commands/env/pull.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2655   +/-   ##
=======================================
  Coverage   52.91%   52.91%           
=======================================
  Files         570      570           
  Lines       21750    21750           
  Branches     4263     4263           
=======================================
  Hits        11506    11506           
  Misses      10213    10213           
  Partials       31       31           

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[github-actions]

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