fix header

Author: alamb

datafusion/catalog-listing/src/mod.rs

@@ -13,7 +13,7 @@
 // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 // KIND, either express or implied.  See the License for the
 // specific language governing permissions and limitations
-// under the License.xz
+// under the License.
 
 #![doc(
     html_logo_url = "https://raw.githubusercontent.com/apache/datafusion/19fe44cf2f30cbdd63d4a4f52c74055163c6cc38/docs/logos/standalone_logo/logo_original.svg",