Fix incorrect drip quota consumption

[sudo-shashank]

Summary of changes

Changes introduced in this pull request:

• Fixes: https://github.com/ChainSafe/forest-explorer/security/advisories/GHSA-3m83-rw5j-9w9h

Reference issue to close (if applicable)

Closes #449

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code
  adheres to the team's
  documentation standards,
• I have added tests that prove my fix is effective or that my feature works
  (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes
  should be reflected in this document.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 54.34783% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.15%. Comparing base (df2e6cc) to head (e46bd04).

Files with missing lines	Patch %	Lines
src/faucet/server.rs	0.00%	40 Missing ⚠️
src/faucet/server_api.rs	0.00%	17 Missing ⚠️
src/faucet/rate_limiter.rs	95.89%	3 Missing ⚠️
src/utils/drip_amount.rs	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
+ Coverage   39.32%   40.15%   +0.82%     
==========================================
  Files          42       42              
  Lines        2919     3046     +127     
==========================================
+ Hits         1148     1223      +75     
- Misses       1771     1823      +52     

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