Remove "canonical" adjective from Status Code (#1081)

* Remove "canonical" adjective from Status Code

Resolves: #1069

* Address PR comments

CHANGELOG.md

@@ -9,6 +9,8 @@ release.
 
 New:
 
+- Rename "Canonical status code" to "Status code"
+  ([#1081](https://github.com/open-telemetry/opentelemetry-specification/pull/1081))
 - Add Metadata for Baggage entries, and clarify W3C Baggage Propagator implementation
   ([#1066](https://github.com/open-telemetry/opentelemetry-specification/pull/1066))
 - Change Status to be consistent with Link and Event

specification/trace/api.md

@@ -508,10 +508,10 @@ status, which is `Unset`.
 
 `Status` is structurally defined by the following properties:
 
-- `StatusCanonicalCode` that represents the canonical set of `Status` codes.
+- `StatusCode`, one of the values listed below.
 - Optional `Description` that provides a descriptive message of the `Status`.
 
-`StatusCanonicalCode` has the following values:
+`StatusCode` is one of the following values:
 
 - `Unset`
   - The default status.
@@ -524,9 +524,9 @@ status, which is `Unset`.
 The Span interface MUST provide:
 
 - An API to set the `Status`. This SHOULD be called `SetStatus`.
-  This API takes the `StatusCanonicalCode`, and optional `Description`,
-  either as individual parameters or as an immutable object encapsulating them,
-  whichever is most appropriate for the language.
+  This API takes the `StatusCode`, and an optional `Description`, either as
+  individual parameters or as an immutable object encapsulating them, whichever
+  is most appropriate for the language.
 
 The status code SHOULD remain unset, except for the following circumstances: