Refer to CacheConfiguration.Default in new secret store extensions

[tomkerkhove]

Is your feature request related to a problem? Please describe.
Providing a cache configuration is mandatory nowadays, but people are not always aware of CacheConfiguration.Default.

Describe the solution you'd like
Update the XML docs to mention CacheConfiguration.Default in new secret store extensions

Describe alternatives you've considered
N/A

Additional context
N/A

[fgheysels]

#239 (comment) \o/

[stijnmoreels]

Hmm, the obsolete secret store extensions already refer to this one though. Not sure which ones you are referring to?

[tomkerkhove]

Ok it is indeed there: https://github.com/arcus-azure/arcus.security/blob/master/src/Arcus.Security.Providers.AzureKeyVault/Extensions/SecretStoreBuilderExtensions.cs#L245

But I might have been looking at a deprecated one: https://github.com/arcus-azure/arcus.security/blob/master/src/Arcus.Security.Providers.AzureKeyVault/Extensions/SecretStoreBuilderExtensions.cs#L179

But that is ok, closing!