releng - Fix permissions in jest-extension job

[herzog31]

Description

• Required for being able to write in the global npm folder, which is required for running npm link

How Has This Been Tested?

• via CircleCI

Types of changes

• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [X] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes and the overall coverage did not decrease.
• [X] All unit tests pass on CircleCi.
• [X] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #952 (a9364ea) into master (7ed0860) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #952   +/-   ##
=========================================
  Coverage     89.47%   89.47%           
  Complexity     2204     2204           
=========================================
  Files           351      351           
  Lines          9860     9860           
  Branches       1422     1422           
=========================================
  Hits           8822     8822           
  Misses          742      742           
  Partials        296      296           

Flag	Coverage Δ
integration	52.17% <ø> (ø)
jest	86.55% <ø> (ø)
karma	95.33% <ø> (ø)
unittests	88.13% <ø> (ø)

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