Fix comment

Author: xylar

compass/ocean/tests/global_ocean/global_ocean.cfg

@@ -101,7 +101,7 @@ max_depth = autodetect
 # the number of vertical levels, always detected automatically
 levels = autodetect
 
-# the date the mesh was created as YYMMDD, typically detected automatically
+# the date the mesh was created as YYYYMMDD, typically detected automatically
 creation_date = autodetect
 # The following options are detected from .gitconfig if not explicitly entered
 author = autodetect