kata-ctl: Update expected test failure message

Update expected error after url crate bump

Signed-off-by: stevenhorsman <steven@uk.ibm.com>

src/tools/kata-ctl/src/check.rs

@@ -470,7 +470,7 @@ mod tests {
             },
             TestData {
                 test_url: "http://localhost :80",
-                expected: "builder error: invalid domain character",
+                expected: "builder error: invalid international domain name",
             },
         ];