Fix indentation level of CHANGELOG entries (#1281)

* Add pre-release instruction to verify dry-run of etc/make_release.py

Author: eramongodb

CHANGELOG.md

@@ -9,24 +9,24 @@ Changes prior to 3.9.0 are documented as [release notes on GitHub](https://githu
 
 ## 4.0.0
 
-## Added
+### Added
 
 - Getter for the `start_at_operation_time` option in `mongocxx::v_noabi::options::change_stream`.
 
-## Changed
+### Changed
 
 - Bump the minimum required C Driver version to [1.29.0](https://github.com/mongodb/mongo-c-driver/releases/tag/1.29.0).
 - CMake option `ENABLE_TESTS` is now `OFF` by default.
   - Set `ENABLE_TEST=ON` to re-enable building test targets.
   - Set `BUILD_TESTING=ON` to include test targets in the "all" target when `ENABLE_TESTS=ON` (since 3.9.0, `OFF` by default).
 - Layout of `mongocxx::v_noabi::options::change_stream` to support the new optional `start_at_operation_time` accessor.
 
-## Deprecated
+### Deprecated
 
 - Support for MongoDB Server 4.0.
   - See: [MongoDB Software Lifecycle Schedules](https://www.mongodb.com/legal/support-policy/lifecycles).
 
-## Removed
+### Removed
 
 - Support for external polyfill libraries.
   - `ENABLE_BSONCXX_POLY_USE_IMPLS=ON` is now implicit behavior.

etc/releasing.md

@@ -255,6 +255,12 @@ Update the contents of related Jira tickets as appropriate (improve the title, c
 > A ticket whose changes may impact users should either be a "Bug" or "New Feature".
 > Otherwise, the ticket should typically be a "Task".
 
+### Dry-run etc/make_release.py
+
+Perform a dry-run of the "Run etc/make_release.py" steps described below.
+
+Verify there are no unexpected errors or issues.
+
 ## Release Steps
 
 ### Update CHANGELOG...
@@ -411,9 +417,9 @@ Run the release script with the git tag created above as an argument and
 
 ```bash
 make_release_args=(
+    -r upstream
     --jira-creds-file ~/.secrets/jira-creds.txt
     --github-token-file ~/.secrets/github-token.txt
-    -r upstream # Only if mongodb/mongo-cxx-driver is not "origin".
 )
 python ./etc/make_release.py "${make_release_args[@]:?}" --dry-run rX.Y.Z
 ```