fix: gin-gonic security advisory issue

[tim-mwangi]

Description

Security advisory GHSA-h395-qcrw-5vmq . Upgrade to github.com/gin-gonic/gin v1.7.7

Testing

Tested by running locally.

Checklist:

• [ ✅ ] My changes generate no new warnings
• [ ✅ ] Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #208 (01ce18c) into main (5aad408) will increase coverage by 0.53%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #208      +/-   ##
==========================================
+ Coverage   58.84%   59.38%   +0.53%     
==========================================
  Files          55       55              
  Lines        2243     2243              
==========================================
+ Hits         1320     1332      +12     
+ Misses        864      853      -11     
+ Partials       59       58       -1     

Impacted Files	Coverage Δ
...atchspanprocessor/batch_span_processor.modified.go	20.14% <0.00%> (+4.47%)	⬆️

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