Replace broken fallback rpc url

[mdomasevicius]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 50 lines in your changes missing coverage. Please review.
✅ Project coverage is 25.53%. Comparing base (9ed4766) to head (ece1be3).
⚠️ Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
ci/check/go_imports.go	0.00%	49 Missing ⚠️
ci/check/check.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6173      +/-   ##
==========================================
- Coverage   25.58%   25.53%   -0.05%     
==========================================
  Files         539      540       +1     
  Lines       31034    31085      +51     
==========================================
- Hits         7941     7939       -2     
- Misses      22304    22357      +53     
  Partials      789      789              

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