Update netty version

[TharmiganK]

Purpose

$Subject

Part of: ballerina-platform/ballerina-library#7358

Trivy scan result with this version update: https://github.com/ballerina-platform/module-ballerina-grpc/actions/runs/11815795901/job/32917720653

Examples

N/A

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility
• Checked the impact on OpenAPI generation

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.47%. Comparing base (921edb0) to head (c42c6df).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##             master    #1655    +/-   ##
==========================================
  Coverage     80.46%   80.47%            
- Complexity        0       56    +56     
==========================================
  Files            72       77     +5     
  Lines          5396     5583   +187     
  Branches       1276     1327    +51     
==========================================
+ Hits           4342     4493   +151     
- Misses          654      671    +17     
- Partials        400      419    +19     

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