Problem: persist-credentials might leak github token unintentionally

[yihuang]

Solution:

• try persist-credentials: false

👮🏻👮🏻👮🏻 !!!! REFERENCE THE PROBLEM YOUR ARE SOLVING IN THE PR TITLE AND DESCRIBE YOUR SOLUTION HERE !!!! DO NOT FORGET !!!! 👮🏻👮🏻👮🏻

PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
• Have you checked your code compiles? (make)
• Have you included tests for any non-trivial functionality?
• Have you checked your code passes the unit tests? (make test)
• Have you checked your code formatting is correct? (go fmt)
• Have you checked your basic code style is fine? (golangci-lint run)
• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
• If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.72%. Comparing base (e92dda1) to head (b433fea).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1090      +/-   ##
==========================================
- Coverage   34.23%   31.72%   -2.51%     
==========================================
  Files          93       93              
  Lines       14151    17020    +2869     
==========================================
+ Hits         4844     5400     +556     
- Misses       8365    10678    +2313     
  Partials      942      942              

Flag	Coverage Δ
integration_tests	23.88% <ø> (-1.82%)	⬇️
integration_tests_byzantine	10.95% <ø> (-0.30%)	⬇️
integration_tests_gov	11.19% <ø> (-0.32%)	⬇️
integration_tests_grpc	11.19% <ø> (-0.32%)	⬇️
integration_tests_ibc	25.66% <ø> (-1.78%)	⬇️
integration_tests_ledger	11.18% <ø> (-0.32%)	⬇️
integration_tests_slow	11.18% <ø> (-0.32%)	⬇️
integration_tests_solomachine	10.98% <ø> (-0.30%)	⬇️
integration_tests_upgrade	11.19% <ø> (-0.32%)	⬇️

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