doc: [package] doesn't require version field

Author: stevenengler

Diff for: src/doc/src/reference/manifest.md

@@ -65,10 +65,10 @@ version = "0.1.0"    # the current version, obeying semver
 authors = ["Alice <[email protected]>", "Bob <[email protected]>"]
 ```
 
-The only fields required by Cargo are [`name`](#the-name-field) and
-[`version`](#the-version-field). If publishing to a registry, the registry may
-require additional fields. See the notes below and [the publishing
-chapter][publishing] for requirements for publishing to [crates.io].
+The only field required by Cargo is [`name`](#the-name-field). If publishing to
+a registry, the registry may require additional fields. See the notes below and
+[the publishing chapter][publishing] for requirements for publishing to
+[crates.io].
 
 ### The `name` field