fix typo (#4495)
`Equipment` is a union, not an enum.
diff --git a/docs/source/Tutorial.md b/docs/source/Tutorial.md
index a1eea12..7def218 100644
--- a/docs/source/Tutorial.md
+++ b/docs/source/Tutorial.md
@@ -210,7 +210,7 @@
used twice: once within the `Monster` table and once within the `Equipment`
enum. For our `Monster`, it is used to populate a `vector of tables` via the
`weapons` field within our `Monster`. It is also the only table referenced by
-the `Equipment` enum.
+the `Equipment` union.
The last part of the `schema` is the `root_type`. The root type declares what
will be the root table for the serialized data. In our case, the root type is
