chore(lint): use blank identifier for context

[nikoksr]

Description

Sets an unused ctx context.Context in lark's WebhookService.Send method to a blank identifier.

Motivation and Context

Fixes the linter complaint as seen here for example. We're not removing the context parameter from the method as it keeps the method signature consistent with the rest of the codebase.

How Has This Been Tested?

Ran linter locally, no more complaints. Test suite passes as well.

Screenshots / Output (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (f708cf6) 75.07% compared to head (60771fe) 75.07%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #569   +/-   ##
=======================================
  Coverage   75.07%   75.07%           
=======================================
  Files          41       41           
  Lines        1376     1376           
=======================================
  Hits         1033     1033           
  Misses        251      251           
  Partials       92       92           

Impacted Files	Coverage Δ
service/lark/webhook.go	39.13% <100.00%> (ø)

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