Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore NuGet version 7.0.x does not support NET 6.0.x, but the EntityFrameworkCore 7.0.x does support NET 6.0.x.

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

May be related to Issue 45278

This NuGet package Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore version 7.0.x only supports NET 7.0

But...
Microsoft.Extensions.Diagnostics.HealthChecks 7.0.x supports NET Standard 2.0, 4.6.2, and 7.0
Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions 7.0.x supports NET Standard 2.0, and 4.6.2
Microsoft.EntityFrameworkCore.* 7.0.x supports NET 6.0

### Describe the solution you'd like

If the item being health checked, EntityFrameworkCore 7.0.x, supports NET 6.0, and the 2 NuGet packages for Microsoft.Extensions.Diagnostics.HealthChecks listed above support 6.0 by supporting Standard 2.0, then shouldn't this package support NET 6, instead of just NET 7.0?

I have EntityFrameworkCore 7.0.x working fine on NET 6.0, and using HealthChecks NuGets 6.0.x.
And it works fine, but I should really be able to update the Hea;lthChecks NuGets to 7.0.x
When I update Microsoft.Extensions.Diagnostics.HealthChecks and Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions to 7.0.x and have to leave Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore on 6.0.x I get a run time exception.

### Additional context

_No response_