Update msal-net-client-assertions.md

fix typo
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cc: @Dickson-Mwendia

Author: OwenRichards1

articles/active-directory/develop/msal-net-client-assertions.md

@@ -149,7 +149,7 @@ static string GetSignedClientAssertion(X509Certificate2 certificate, string tena
 
 ### Alternative method
 
-You also have the option of using [Microsoft.IdentityModel.JsonWebTokens](https://www.nuget.org/packages/Microsoft.IdentityModel.JsonWebTokens/) to create the assertion for you. The code will be a more elegant as shown in the example below:
+You also have the option of using [Microsoft.IdentityModel.JsonWebTokens](https://www.nuget.org/packages/Microsoft.IdentityModel.JsonWebTokens/) to create the assertion for you. The code will be more elegant as shown in the example below:
 
 ```csharp
         string GetSignedClientAssertionAlt(X509Certificate2 certificate)