Fixed exception message link in invalid license

Author: ivaylokenov

src/MyTested.AspNetCore.Mvc.Licensing/TestCounter.cs

@@ -45,7 +45,7 @@ public static void IncrementAndValidate()
                         }
                         catch (InvalidLicenseException ex)
                         {
-                            invalidLicenseMessage = $"{(licenses == null ? string.Empty : $"You have invalid license: '{ex.Message}'. ")}The free-quota limit of {MaximumAllowedAssertions} assertions per test project has been reached. Please visit https://mytestedasp.net/products/mvc#pricing to request a free license or upgrade to a commercial one.";
+                            invalidLicenseMessage = $"{(licenses == null ? string.Empty : $"You have invalid license: '{ex.Message}'. ")}The free-quota limit of {MaximumAllowedAssertions} assertions per test project has been reached. Please visit https://mytestedasp.net/core/mvc#pricing to request a free license or upgrade to a commercial one.";
                         }
 
                         if (!LicenseValidator.HasValidLicense)

test/MyTested.AspNetCore.Mvc.Licensing.Test/TestCounterTests.cs

@@ -43,6 +43,7 @@ public void IncrementAndValidateShouldThrowExceptionWithNoLicense()
 
             Assert.NotNull(caughtException);
             Assert.IsAssignableFrom<InvalidLicenseException>(caughtException);
+            Assert.Equal("The free-quota limit of 500 assertions per test project has been reached. Please visit https://mytestedasp.net/core/mvc#pricing to request a free license or upgrade to a commercial one.", caughtException.Message);
         }
 
         [Fact]
@@ -82,6 +83,7 @@ public void IncrementAndValidateShouldThrowExceptionWithInvalidLicense()
 
             Assert.NotNull(caughtException);
             Assert.IsAssignableFrom<InvalidLicenseException>(caughtException);
+            Assert.Equal("You have invalid license: 'License is not valid for this version of My Tested ASP.NET Core MVC. License expired on 2017-10-15. This version of My Tested ASP.NET Core MVC was released on 2018-10-10'. The free-quota limit of 500 assertions per test project has been reached. Please visit https://mytestedasp.net/core/mvc#pricing to request a free license or upgrade to a commercial one.", caughtException.Message);
         }
 
         [Fact]