Fixed failing test which now expects an Unauthorized exception

tests/Microsoft.Bot.Connector.Tests/Authentication/JwtTokenExtractorTests.cs

@@ -85,7 +85,7 @@ public async Task JwtTokenExtractor_WithValidCert_ShouldNotAllowCertSigningKey()
                 var cert = CreateSelfSignedCertificate(cn, from: now.AddDays(-10), to: now.AddDays(9));
 
                 // Build token extractor and use it to validate a token created from the cert
-                await BuildExtractorAndValidateToken(cert);
+                await Assert.ThrowsAnyAsync<UnauthorizedAccessException>(() => BuildExtractorAndValidateToken(cert));
 
                 DeleteKeyContainer(cn);
             }