v.db.renamecolumn: add rename keyword for keyword consistency

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73207 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.db.renamecolumn/v.db.renamecolumn.py

@@ -25,6 +25,7 @@
 #% keyword: vector
 #% keyword: attribute table
 #% keyword: database
+#% keyword: rename
 #%end
 #%option G_OPT_V_MAP
 #%end