Fix mainnet geth snapshot docs

[boyuan-chen]

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Overview

Describe what your Pull Request is about in a few sentences.

Fix the snapshot link

Changes

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• Update docs link

Testing

Describe how to test your new feature/bug fix and if possible, a step by step guide on how to demo this.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.31%. Comparing base (163c36c) to head (b2e513b).

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #233   +/-   ##
========================================
  Coverage    41.31%   41.31%           
========================================
  Files           74       74           
  Lines         5001     5001           
  Branches       785      785           
========================================
  Hits          2066     2066           
  Misses        2828     2828           
  Partials       107      107           

Flag	Coverage Δ
cannon-go-tests	81.92% <ø> (ø)
chain-mon-tests	27.14% <ø> (ø)
common-ts-tests	26.72% <ø> (ø)
contracts-ts-tests	12.25% <ø> (ø)
core-utils-tests	44.03% <ø> (ø)
sdk-tests	37.59% <ø> (ø)

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