chore: Update the package table in README.md

Author: amanda-tarafa

README.md

@@ -446,6 +446,7 @@ The libraries are shown in the following table.
 | [Google.Apis.SecretManager.v1](https://googleapis.dev/dotnet/Google.Apis.SecretManager.v1/latest/api/Google.Apis.SecretManager.v1.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecretManager.v1)](https://www.nuget.org/packages/Google.Apis.SecretManager.v1) | [Secret Manager API v1](https://cloud.google.com/secret-manager/) |
 | [Google.Apis.SecretManager.v1beta1](https://googleapis.dev/dotnet/Google.Apis.SecretManager.v1beta1/latest/api/Google.Apis.SecretManager.v1beta1.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecretManager.v1beta1)](https://www.nuget.org/packages/Google.Apis.SecretManager.v1beta1) | [Secret Manager API v1beta1](https://cloud.google.com/secret-manager/) |
 | [Google.Apis.SecretManager.v1beta2](https://googleapis.dev/dotnet/Google.Apis.SecretManager.v1beta2/latest/api/Google.Apis.SecretManager.v1beta2.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecretManager.v1beta2)](https://www.nuget.org/packages/Google.Apis.SecretManager.v1beta2) | [Secret Manager API v1beta2](https://cloud.google.com/secret-manager/) |
+| [Google.Apis.SecureSourceManager.v1](https://googleapis.dev/dotnet/Google.Apis.SecureSourceManager.v1/latest/api/Google.Apis.SecureSourceManager.v1.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecureSourceManager.v1)](https://www.nuget.org/packages/Google.Apis.SecureSourceManager.v1) | [Secure Source Manager API v1](https://cloud.google.com/secure-source-manager) |
 | [Google.Apis.SecurityCommandCenter.v1](https://googleapis.dev/dotnet/Google.Apis.SecurityCommandCenter.v1/latest/api/Google.Apis.SecurityCommandCenter.v1.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecurityCommandCenter.v1)](https://www.nuget.org/packages/Google.Apis.SecurityCommandCenter.v1) | [Security Command Center API v1](https://cloud.google.com/security-command-center) |
 | [Google.Apis.SecurityCommandCenter.v1beta1](https://googleapis.dev/dotnet/Google.Apis.SecurityCommandCenter.v1beta1/latest/api/Google.Apis.SecurityCommandCenter.v1beta1.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecurityCommandCenter.v1beta1)](https://www.nuget.org/packages/Google.Apis.SecurityCommandCenter.v1beta1) | [Security Command Center API v1beta1](https://cloud.google.com/security-command-center) |
 | [Google.Apis.SecurityCommandCenter.v1beta2](https://googleapis.dev/dotnet/Google.Apis.SecurityCommandCenter.v1beta2/latest/api/Google.Apis.SecurityCommandCenter.v1beta2.html) | [![NuGet](https://img.shields.io/nuget/v/Google.Apis.SecurityCommandCenter.v1beta2)](https://www.nuget.org/packages/Google.Apis.SecurityCommandCenter.v1beta2) | [Security Command Center API v1beta2](https://cloud.google.com/security-command-center) |