Update KNet to version 2.7.6, Microsoft.EntityFrameworkCore and Microsoft.EntityFrameworkCore.InMemory, bump version to 2.3.4

[masesdevelopers]

Description

Update KNet to version 2.7.6, Microsoft.EntityFrameworkCore and Microsoft.EntityFrameworkCore.InMemory, bump version to 2.3.4

Related Issue

fix #22
fix #140
fix #254

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[masesdevelopers]

Test fails with the following error:

Unhandled exception. System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.IO.FileNotFoundException: Unable to identify JNet Jar location
File name: '/home/runner/work/KEFCore/KEFCore/bin/net6.0/jars/jnet-2.5.6.jar'