[SM-894] Increase secret value max limit

[Thomas-Avery]

Type of change

- [ ] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [X] Other

Objective

The purpose of this PR is to increase the max length limit of secret values.

Code changes

• src/Api/SecretsManager/Models/Request/SecretCreateRequestModel.cs:
  Increase limit.

• src/Api/SecretsManager/Models/Request/SecretUpdateRequestModel.cs:
  Increase limit.

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• If making database changes - make sure you also update Entity Framework queries and/or migrations
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[bitwarden-bot]

Checkmarx One – Scan Summary & Details – 311a66d2-6e83-4009-8cfc-c9e4effb6c10

No New Or Fixed Issues Found