Reflect the changes in rust-lang/rust#67000 (#1632)

Signed-off-by: Yuki Okushi <jtitor@2k36.org>

src/mir/index.md

@@ -233,14 +233,13 @@ but [you can read about those below](#promoted)).
 - **Terminators** are represented by the [`Terminator`].
 - **Locals** are represented by a [newtype'd] index type [`Local`].
   The data for a local variable is found in the
-  [`Body::local_decls`][localdecls] vector). There is also a special constant
+  [`Body::local_decls`][localdecls] vector. There is also a special constant
   [`RETURN_PLACE`] identifying the special "local" representing the return value.
-- **Places** are identified by the enum [`Place`]. There are a few
-  variants:
+- **Places** are identified by the struct [`Place`]. There are a few
+  fields:
   - Local variables like `_1`
-  - Static variables `FOO`
   - **Projections**, which are fields or other things that "project
-    out" from a base place. These are represented by the type
+    out" from a base place. These are represented by the [newtype'd] type
     [`ProjectionElem`]. So e.g. the place `_1.f` is a projection,
     with `f` being the "projection element" and `_1` being the base
     path. `*_1` is also a projection, with the `*` being represented