[SILO-820] fix: update serializer for module detail API endpoint to use ModuleUpdateSerializer

[dheeru0198]

Description

This fixes the issue with adding memebers to module for API

Type of Change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Feature (non-breaking change which adds functionality)
• [ ] Improvement (change that would cause existing functionality to not work as expected)
• [ ] Code refactoring
• [ ] Performance improvements
• [ ] Documentation update

Screenshots and Media (if applicable)

Test Scenarios

References

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[!NOTE] Aligns the module update endpoint with the correct update schema.

• In ModuleDetailAPIEndpoint.patch, replace ModuleSerializer with ModuleUpdateSerializer for partial updates
• Keeps OpenAPI request/response consistent with actual behavior and enables correct validation for update fields (e.g., members)

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Summary by CodeRabbit

• Bug Fixes
  • Enhanced module update processing to ensure accurate handling of partial updates.

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