update links

Author: jmckenna

en/ogc/wms_server.txt

@@ -2462,7 +2462,7 @@ FAQ / Common Problems
 .. _`Symbology Encoding Implementation Specification`: https://portal.ogc.org/files/?artifact_id=16700 
 .. _`The EPSG web page`: https://epsg.org/
 .. _`https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities`: https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities
-.. _`https://schemas.opengis.net/`: https://schemas.opengis.net/
+.. _`https://schemas.opengis.net`: https://schemas.opengis.net
 .. _`https://proj.org/`: https://proj.org/
 .. _`http://www.maptools.org/dl/proj4-epsg.zip`: http://www.maptools.org/dl/proj4-epsg.zip