Fix typos

LogicalTypes.md

@@ -714,9 +714,9 @@ to values. `MAP` must annotate a 3-level structure:
   field for map keys and, optionally, a `value` field for map values. It must
   not contain any other values.
 * The `key` field encodes the map's key type. This field must have
-  repetition `required` and must always be present. I must be placed at the 0th
-  position of the `key_value` group. It is suggested to use a primitive as the
-  type.
+  repetition `required` and must always be present. It must be placed at the
+  0th position of the `key_value` group. It is suggested to use a primitive as
+  the type.
 * The `value` field encodes the map's value type and repetition. This field can
   be `required`, `optional`, or omitted. It must be placed at the 1st position
   of the `key_value` group if present. In case of not present, the map can be
@@ -751,7 +751,7 @@ be used in existing data and should not be enforced as errors when reading.
 Some existing data incorrectly used `MAP_KEY_VALUE` in place of `MAP`. For
 backward-compatibility, a group annotated with `MAP_KEY_VALUE` that is not
 contained by a `MAP`-annotated group should be handled as a `MAP`-annotated
-group. `MAP_KEY_VALUE` may be used for the `kay_value` group.
+group. `MAP_KEY_VALUE` may be used for the `key_value` group.
 
 Examples that can be interpreted using these rules: