OpenIdConnectServer health check does not allow RS512 only signing algorithm

[m-gug]

What happened:
The current implementation expects the OIDC provider to support RS256 as a signature algorithm.

What you expected to happen:
It should also be allowed that the OIDC provider only supports RS512 and the health check still works.

How to reproduce it (as minimally and precisely as possible):
Run the health check against a ODIC Provider that only supports RS512 as signing algorithm.

• .NET Core version 8
• Healthchecks version 8.0.0

[DanRogers99]

We also use another signing algorithm.

It would be good if we could override this property

AspNetCore.Diagnostics.HealthChecks/src/HealthChecks.OpenIdConnectServer/OidcConstants.cs

Line 23 in 73abc7a

internal static string[] REQUIRED_ALGORITHMS => new[] { "RS256" };

[m-gug]

@DanRogers99
Yes, I agree. I added to my PR so that the algorithms can be specified as parameters.