fix: date field for content system

[baywet]

Signed-off-by: Vincent Biret vibiret@microsoft.com

[learn-build-service-prod]

Learn Build status updates of commit 2d10e63:

✅ Validation status: passed

File	Status	Preview URL	Details
OpenAPI/kiota/abstractions.md	✅Succeeded
OpenAPI/kiota/add-api.md	✅Succeeded
OpenAPI/kiota/authentication.md	✅Succeeded
OpenAPI/kiota/backing-store.md	✅Succeeded
OpenAPI/kiota/dependencies.md	✅Succeeded
OpenAPI/kiota/design.md	✅Succeeded
OpenAPI/kiota/errors.md	✅Succeeded
OpenAPI/kiota/experience.md	✅Succeeded
OpenAPI/kiota/includes/get-azure-auth-code-manually.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-auth-code-intro.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-auth-code-portal.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-auth-code-powershell.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-device-code-intro.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-device-code-portal.md	✅Succeeded
OpenAPI/kiota/includes/register-azure-app-device-code-powershell.md	✅Succeeded
OpenAPI/kiota/index.yml	✅Succeeded
OpenAPI/kiota/install.md	✅Succeeded
OpenAPI/kiota/middleware.md	✅Succeeded
OpenAPI/kiota/models.md	✅Succeeded
OpenAPI/kiota/overview.md	✅Succeeded
OpenAPI/kiota/query-parameters-request-headers.md	✅Succeeded
OpenAPI/kiota/quickstarts/cli.md	✅Succeeded
OpenAPI/kiota/quickstarts/dotnet.md	✅Succeeded
OpenAPI/kiota/quickstarts/go.md	✅Succeeded
OpenAPI/kiota/quickstarts/index.md	✅Succeeded

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