fixed typos

Author: toramanlis

.wiki

@@ -38,10 +38,10 @@
     - [`MedumIncrements`](#mediumincrements)
     - [`CFloat`](#cfloat)
     - [`Decimal`](#decimal)
-    - [`dateTime`](#datetime)
-    - [`dateTimeTz`](#datetimetz)
-    - [`time`](#time)
-    - [`timeTz`](#timetz)
+    - [`DateTime`](#datetime)
+    - [`DateTimeTz`](#datetimetz)
+    - [`Time`](#time)
+    - [`TimeTz`](#timetz)
     - [`Timestamp`](#timestamp)
     - [`TimestampTz`](#timestamptz)
     - [`Enum`](#enum)