Fixed test after update of server

cmd/kosli/beginTrail_test.go

@@ -39,7 +39,7 @@ func (suite *BeginTrailCommandTestSuite) TestBeginTrailCmd() {
 			wantError: true,
 			name:      "fails when name is considered invalid by the server",
 			cmd:       fmt.Sprintf("begin trail foo?$bar --flow %s %s", suite.flowName, suite.defaultKosliArguments),
-			golden:    "Error: Input payload validation failed: map[name:'foo?$bar' does not match '^[a-zA-Z0-9][a-zA-Z0-9\\\\-_\\\\.~]*$']\n",
+			golden:    "Error: Input payload validation failed: map[name:'foo?$bar' does not match '^[a-zA-Z0-9][a-zA-Z0-9\\\\.\\\\-_~]*$']\n",
 		},
 		{
 			wantError: true,