update MVT notes

Author: jmckenna

en/output/tile_mode.txt

@@ -210,8 +210,7 @@ Since the MapServer 7.2.0 release, MapServer is able to output MVT vector tiles.
 - verify that your mapfile has a :ref:`PROJECTION` object defined for 
   every :ref:`LAYER`
 
-- add an OUTPUTFORMAT block to your mapfile, to leverage GDAL's 
-  `MVT driver <https://gdal.org/en/stable/drivers/vector/mvt.html>`__ :
+- add an OUTPUTFORMAT block to your mapfile, such as :
 
   .. code-block:: mapfile
 
@@ -239,7 +238,7 @@ Since the MapServer 7.2.0 release, MapServer is able to output MVT vector tiles.
   `demo.pbf`, and then execute `ogrinfo <https://gdal.org/en/stable/programs/ogrinfo.html>`__ 
   on the file to examine it
 
-  - the ogrinfo response should contain a message such as `using driver `MVT' successful`
+  - the ogrinfo response should contain a message such as `"using driver `MVT' successful"`
 
 Using Google Maps
 -----------------