opentelemetry: improve the 0.12 changelog (#436)

The api module (not a crate) was already private, so that entry doesn't seem to be useful
for most users. Additionally, this missed the removal of the http-related types and
implementations, which probably is relevant to a larger audience.

Author: djc

opentelemetry/CHANGELOG.md

@@ -11,14 +11,14 @@
 ## Changed
 
 - Dependencies updates #410
-- Dissolve api crate and move its crates to top level #412
 - Add `Send`, `Sync` to `AsyncInstrument` in metrics #422
-- Add `Send`, `Sync` to `InstrumentCore` in metrics #423  
+- Add `Send`, `Sync` to `InstrumentCore` in metrics #423
 - Replace regex with custom logic #411
 - Update tokio to v1 #421
 
 ## Removed
 
+- Moved `http` dependencies into a new opentelemetry-http crate #415
 - Remove `tonic` dependency #414
 
 ## [v0.11.2](https://github.com/open-telemetry/opentelemetry-rust/compare/v0.11.1...v0.11.2)
@@ -38,7 +38,7 @@
 ## Added
 
 - Add `force_flush` method to span processors #358
-- Add timeout for `force_flush` and `shutdown` #362 
+- Add timeout for `force_flush` and `shutdown` #362
 
 ## Changed
 
@@ -169,7 +169,7 @@
 
 ### Changed
 - Update sampler types #128
-  - `Always` is now `AlwaysOn`. `Never` is now `AlwaysOff`. `Probability` now ignores parent 
+  - `Always` is now `AlwaysOn`. `Never` is now `AlwaysOff`. `Probability` now ignores parent
     sampled state.
 - `base64` and `binary_propagator` have been moved to `experimental` module. #134
 - `Correlation-Context` header has been updated to `otcorrelations` #145
@@ -253,7 +253,7 @@
 ### Added
 - New Base64 propagator
 - New SpanBuilder api
-- Zipkin Exporter crate 
+- Zipkin Exporter crate
 
 ### Changed
 - Switch to `SpanId` and `TraceId` from `u64` and `u128`