chore: retry fetch dashboard assets

[tisonkun]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This closes #3382.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.27%. Comparing base (b1e290f) to head (44d90b5).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3394      +/-   ##
==========================================
- Coverage   85.68%   85.27%   -0.41%     
==========================================
  Files         893      893              
  Lines      147382   147391       +9     
==========================================
- Hits       126285   125692     -593     
- Misses      21097    21699     +602