Update HTML for mapcache and mapserver to be more accurate

mapserver/html/index.html

@@ -9,11 +9,11 @@ This tile server for the CSPP Geo Geo2Grid project.
 To access tiles using a standard WMS protocol:
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-http://localhost/wms/goes16/abi/fldk/l1b?...
+http://localhost/wms/goes16/abi/radf/l1b?...
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-Where "fldk" stands for Full Disk and "..." represents all remaining WMS
-parameters. Other sectors available are "m01", "m02", and "conus".
+Where "radf" corresponds to Full Disk and "..." represents all remaining WMS
+parameters. Other sectors available are "radm01", "radm02", and "radc".
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