examples(auth-jwt): use named store export to prevent warning

[alexandreDavid]

Types of changes

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

Description

The auth-jwt example provides a warning message for deprecated synthax in the console.
Just adjusting the code as explained in the documentation.

Remove the console message

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #5775 into dev will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #5775      +/-   ##
==========================================
+ Coverage   95.64%   95.67%   +0.03%     
==========================================
  Files          82       82              
  Lines        2661     2661              
  Branches      682      682              
==========================================
+ Hits         2545     2546       +1     
+ Misses         98       97       -1     
  Partials       18       18

Flag	Coverage Δ
#e2e	100% <ø> (ø)	⬆️
#fixtures	50.69% <ø> (ø)	⬆️
#unit	92.63% <ø> (+0.03%)	⬆️

Impacted Files	Coverage Δ
packages/vue-renderer/src/renderer.js	94.3% <0%> (+0.81%)	⬆️

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